2020-2021学年度高一下学期英语单元双基精品试卷 必修四 Unit5 Theme parks(B）（含答案）

-1123950339725此卷只装订不密封
班级 姓名 准考证号 考场号 座位号
此卷只装订不密封
班级 姓名 准考证号 考场号 座位号
2020-2021学年度高一下学期英语单元双基精品试卷
必修四 Unit5 Theme parks （B）
阅读理解
A
A theme park manager has the job of watching over and controlling the daily operations of the theme park. One of their most important jobs is to manage the visitors’ experience. This can include everything from the appearance of the park to the hours of operation. A theme park manager also makes plans and develops strategies(策略) to ensure the health and safety of visitors. To help keep visitors satisfied, he usually sets customer service polices(政策) that show how employees should treat visitors and respond to their needs.
Often, theme park managers make decisions regarding theme park policies. For example, the manager of a theme park may have to decide when the park opens and closes daily. He may also choose when the park will open and close for the season. If the weather turns terrible, the manager often has to decide whether or not to open the park for the day. A person in this position may also be responsible for making policies on when a visitor can get a refund(退款) or discount on his admission fee.
The amusements in a theme park have to be maintained(保养) in order to ensure they stay in good working order to ensure they stay in good working order. A theme park manager typically carries out a routine inspection. The individual who holds this position also creates plans and strategies for dealing with emergencies. He may also watch over security workers who help keep the park safe for visitors.
Some theme park managers also have the job of staying abreast of changes in the theme park industry and knowing what the park’s competitors are doing. The information the manager gets through these efforts often helps him decide when to make improvements and how to keep the park competitive.
The extent(范围) of a theme park manager’s job may depend on the size of the park. In a small park, he may closely with his employees. In a large park, he may work to set polices and then depend on other managers or department heads to carry them out. What he needs to do is watch over these managers.
1. What might be a theme park manager’s most important job?
A. To make sure the park gets regular improvements.
B. To make the park workers perform their jobs well.
C. To ensure the visitors have a satisfying experience.
D. To ensure the customers service policies work well.
2. The decisions made by theme park managers usually depend on .
A. customers’ needs. B. theme park policies.
C. the size of the park. D. weather conditions.
3. The underlined phrase “staying abreast of” in Paragraph 4 probably mean “ ”.
A. knowing about B. bringing about
C. calling for D. getting used to
4. The writer develops the passage by .
A. telling stories B. giving examples
C. making comments D. making comparison

B
Whether we should allow marine(海洋的) parks to stay open has been widely debated in our community recently. A variety of different arguments have been put forward about it.
Smith, a sociologist, argued that dolphin parks provide the only opportunity for much of the public to see marine mammals. As this argument goes, most Australians live in cities and never get to see these animals. Marine parks allow the average Australian to appreciate our marine wildlife. However, in fact, there are many places where they can be seen in the wild. Moreover, these places do not charge an overpriced entry fee — they are free.
Dr. Alison Lane, the director of the Cairns Marine Science Institute, insists that we need marine parks for scientific research. She argues that much of our knowledge of marine mammals comes from studies which were undertaken at marine parks. The knowledge which is obtained at marine parks can be useful for planning for the preservation of marine mammal species. However, Jones, a zoologist, explains that park research is only useful for understanding captive animals and is not useful for learning about animals in the wild. Their diets are different, they have significantly lower life lengths and they are more likely to have a disease. In addition, marine mammals in dolphin parks are trained and this means that their patterns of social behaviour are changed.
The Marine Park Owners Association holds that marine parks attract a lot of foreign tourists. This position goes on to state that these tourists spend a lot of money, increasing our foreign exchange earnings and assisting our national balance of payments. However, foreign tourists would still come to Australia if the parks were closed down. Indeed, surveys of overseas tourists show that they come here for a variety of other reasons and not to visit places like Seaworld. Tourists come here to see our native wildlife in its natural environment and not to see it in cages and concrete pools. They can see animals in those conditions in their own countries.
In a word, perhaps an agreement cannot be reached now. However, a question does deserve our consideration: If we continue with our past crimes against these creatures, how will our future generations view us?
5. Who support(s) the idea of closing marine parks?
A. Most Australians. B. Alison Lane. C. Smith. D. Jones.
6. What does the author intend to tell us in Paragraph 3 ?
A. The results from studies are valuable in animal preservation.
B. Scientific research at the marine parks has its limitations.
C. Captive animals have biology changes in marine parks.
D. Human behavior causes harmful effects on the animals.
7. Which is NOT the reason to keep marine parks?
A. For entertainment purpose. B. For scientific research purpose.
C. For economic purpose. D. For political purpose.
8. The author tries to persuade readers to accept his argument mainly by .
A. pointing out the problems with keeping the marine parks
B. using evidence he has collected at the marine parks
C. discussing the advantages of animals’ natural homes
D. questioning the way the animals are studied

七选五
With advances in transportation and information technology, even the most remote places on Earth are within reach of the traveler. In fact, tourism is now the world’s largest industry, with nature tourism growing the fastest. 9 In response to this increasing appreciation of nature experiences, a new form of travel has arisen called ecotourism.
10 The Nature Conservancy adopts the concept explained by the International Union for Conservation of Nature(IUCN): Environmentally responsible travel to natural areas, in order to enjoy and appreciate nature that promotes conservation, has a low visitor influence and provides for beneficially active socio-economic involvement of local people.
Increased tourism to sensitive natural areas without appropriate planning and management can threaten(威胁) the whole of ecosystems and local cultures. 11 Likewise, local communities and can be harmed in numerous ways by crowded foreign visitors and wealth.
12 Ecotourism can provide much-needed revenues(收益) for the protecting of national parks and other natural areas, which might not be available from other sources.
Additionally, ecotourism can provide a practical economic development alternative for local communities with few other income-generating options. Besides, ecotourism can increase the level of education and activism(积极) among travelers. 13
A. What is ecotourism?
B. The growth of the ecotourism income is also beneficial to the local people.
C. And it makes them more enthusiastic and effective spokesmen for conservation.
D. But most of the tourism in natural areas nowadays is not ecotourism at all.
E. However, this same growth does good to both conservation and local communities.
F. People want to experience nature, but should try not to affect the natural environment.
G. The increase of visitors to ecologically sensitive areas can lead to much environmental damage.

三、完形填空
There are times when we feel as if our bad circumstances will never change. When we meet troubles or problems in our lives, we are 14 for a sign that tells us everything will be 15 and get better.
When in this mindset(心态), I think back to a 16 I once heard about a family having dinner at a Chinese restaurant. At the end of the meal, everyone 17 their fortune cookie and read their messages out loud. 18 , the youngest child did not, she went to get another fortune cookie. This 19 several times before the mom stopped her and asked, “What are you doing?” The little child responded, “I am looking for a cookie with the 20 fortune for me.” The mom said, “There is only one thing you need to 21 and it’s not in a fortune cookie. That is where there is a will there’s a way.”
When 22 are not going our way, we may 23 the right fortune. We seek the hope for our 24 so that it will be better than the present. Once the Israelis were expelled(驱逐) in a foreign country against their will. At that time, everything was 25 for them, but they didn’t lose hope; instead, they 26 to their new environment positively. Years later they returned to their homeland as they had 27 .
In life we need to take action and hope and believe that nothing is impossible to a willing mind. It does 28 that good things do come out of bad and difficult situations.
14. A. ready B. grateful C. responsible D. desperate
15. A. settled B. hidden C. defeated D. gone
16. A. message B. story C. problem D. case
17. A. ate B. tasted C. touched D. opened
18. A. Anyhow B. However C. Otherwise D. Therefore
19. A. changed B. ran C. happened D. showed
20. A. good B. bad C. wrong D. right
21. A. doubt B. guess C. know D. hope
22. A. memories B. things C. questions D. chances
23. A. search for B. make up C. take out D. wrestle with
24. A. family B. work C. business D. future
25. A. easy B. difficult C. common D. special
26. A. adjusted B. turned C. stuck D. agreed
27. A. left B. expected C. talked D. remembered
28. A. prove B. tell C. consider D. understand

语法填空
A theme park in France started a new and environmentally-friendly way 29 (deal) with litter. It has trained six rooks(白嘴鸦) to pick up rubbish. Rooks are members of the crow family. The birds have been trained to pick up cigarette 30 (end), paper and other things 31 (throw) on the ground. The birds pick up the litter and put it in a trash can. This gives the crows food as a reward. The more litter the birds put in the trash, the more food 32 get.
The head of the park 33 (give) several reasons for using the crows. He said: “The goal is not just to clean up...but also to demonstrate 34 nature itself can teach us to take care of the environment.” Crows are sociable and 35 (intelligence). They may be as smart as a seven-year-old child. The theme park head said: “In 36 affectionate, supportive atmosphere, they like to communicate with humans and 37 (establish) a relationship through play.” The crows are quick workers. They can fill a bucket 38 rubbish in less than 45 minutes.

应用文写作
假定你是李华，你的美国朋友Henry来信说他寒假期间将来中国旅游，并借此了解中国文化。请你给他写封回信，内容包括：
1.表示欢迎；
2.推荐景点；
3.简述理由。
注意：
1.词数80左右；
2.可以适当增加细节，以使行文连贯；
3.信的格式已为你写好。







六、读后续写
阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。续写的词数应为150左右。
Arthur, a young painter, went to France to surround himself with beauty and inspiration. He lived on the cheap, painted every day, visited museums, traveled to picturesque places, bravely spoke to everyone he met, and showed his work to anyone who would look at it. One afternoon, he struck up a conversation at a cafe with a group of charming young people, who turned out to be some fancy nobles.They took a liking to Arthur and invited him to a party that weekend in a castle in the Loire Valley. They said this was going to be the party of the year. It would be attended by the rich and famous and by several crowned heads of Europe. Best of all, it was a masquerade ball(化妆舞会). “Dress up,” they said, “and join us!”
Excited, Arthur worked all week on a costume(服装) that he was certain would be highly impressive. He held back on neither the details nor the imagination of this creation. Then he rented a car and drove three hours to the castle. He changed into his costume in the car and went up the castle steps. Arthur entered the ballroom, proud.
Upon arrival, he immediately realized his mistake.
This was indeed a costume party but this was a themed costume party. The theme was “a medieval court”. All around him, the wealthy and beautiful were dressed in fancy clothes, wearing sparkling jewels. Arthur, on the other hand, was dressed as a Lobster(龙虾), wearing a red coat, red tights, red ballet slippers, and giant red claws, Also, his face was painted red. And he was the only American in the room, too
Paragraph l:
He stood at the top of the steps for one long, frightful moment.






Paragraph 2:
As he moved into the crowd, a silence fell.







必修四 Unit5 Theme parks
答案
阅读理解
【答案】1-4 CDAB
【解析】本文是一篇说明文。文章主要向读者介绍主题公园管理者的职责、工作范围等等，让读者对主题公园管理这一工作有更好的认识。
1.细节理解题。根据文章第一段中“One of their most important jobs is to manage the visitors’ experience.”可知主题公园管理者最重要的工作可能是让游客有一段满意的经历。故选C。
2.推断判断题。根据文章第二段第一句“Often, theme park managers make decisions regarding theme park policies.”并结合下文举的例子，主题公园在特定的季节和特定的日子何时开门何时关门，以及如果天气不好是否开门。可推断主题公园管理者在做决定时通常要依赖天气条件。故选D。
3.词义猜测题。联系下半句“knowing what the park’s competitors are doing.”可知主题公园的管理者需要知道主题公园行业的变化。故这里knowing about符合句意。故选A。
4.细节理解题。根据文章内容，作者介绍主题公园管理者的每项职责之后都有举例子，再结合文章中的一些关键词如For example等，故选B。
【答案】5-8 DBDA
【解析】文章是关于是否保留海洋公园的争论，不同的人有不同的观点，不赞同的人认为海洋公园有娱乐、进行科学研究和改善经济的功能，而不赞同的认为这些科学研究是有局限性的，而且即使没有海洋公园，游客也会来游玩。
5.细节理解题。从文章第三段“However, Jones, a zoologist, explains that park research is only useful for understanding captive animals and is not useful for learning about animals in the wild.”可知Jones支持关闭海洋公园的想法，选D。
6.细节理解题。从文章第三段“However, Jones, a zoologist, explains that park research is only useful for understanding captive animals and is not useful for learning about animals in the wild.”可知作者想要告诉我们在海洋公园的科学研究有它的局限性，选B。
7.细节理解题。从文章第三段“Dr. Alison Lane, the director of the Cairns Marine Science Institute, insists that we need marine parks for scientific research.”和文章第四段“The Marine Park Owners Association holds that marine parks attract a lot of foreign tourists. This position goes on to state that these tourists spend a lot of money, increasing our foreign exchange earnings and assisting our national balance of payments.”可知保留海洋公园的原因有：娱乐功能，科学研究，经济目的，但是没有提到有政治目的，选D。
8.细节理解题。从文章最后一段“However, a question does deserve our consideration: If we continue with our past crimes against these creatures, how will our future generations view us?”可知作者想说服读者接受这种论点主要是通过指出保留海洋公园的问题。选A。
二、七选五
【答案】9-13 FAGEC
【解析】这是一篇说明文，主要介绍了一种新型的旅游形式——生态旅游。
9.下文提示：随着喜欢体验大自然的人越来越多，一种新的旅游形式，生态旅游出现了。因此推断F项（人们想要体验大自然，但是应当努力不要对自然环境造成影响。）符合语境，“生态旅游”不会影响自然环境。故选F。
10.由空格下文可知，自然保护区采用国际自然保护联盟（IUCN）所解释的概念：在一定自然地域中进行的有责任的旅游行为，为了享受和欣赏历史的和现存的自然文化景观，这种行为应该在不干扰自然地域、保护生态环境、降低旅游的负面影响和为当地人口提供有益的社会和经济活动的情况下进行。这是介绍生态旅游的概念，故选A。
11.由空格上文“Increased tourism to sensitive natural areas without appropriate planning and management can threaten the whole of ecosystems and local cultures.”可知，没有适当的规划和管理，增加对敏感自然地区的旅游活动可能会威胁整个生态系统和当地文化。因此推断G项（前往生态敏感地区的游客增加，可能会对环境造成很大损害。）符合语境。故选F。
12.由下文“Ecotourism can provide much-needed revenues for the protecting of national parks and other natural areas, which might not be available from other sources.”可知，生态旅游可以为保护国家公园和其他自然区域提供急需的收入来源。因此推断E项（然而，同样的增长对于环保和当地社区都有好处。）符合语境，故选E。
13.由上文“ecotourism can increase the level of education and activism among travelers”可知，生态旅游可以提高旅行者的教育和积极性水平。因此推断C项（生态旅游让他们成为热情的有效的环境保护发言人。）符合语境。故选C。
三、完形填空
【答案】14-18 DABDB 19-23 CDCBA 24-28 DBABA
【解析】本文是一篇记叙文。文章主要讲述了一个家庭在中国餐馆吃饭的故事，从而告诉我们“有志者事竟成”的道理。
14.考查形容词。句意：当我们在生活中遇到麻烦或问题时，我们渴望有一个迹象，告诉我们一切都会得到解决并变得更好。A. ready：准备好的；B. grateful：感激的；C. responsible：负有责任的；D. desperate：极度渴望的。固定短语be desperate for：非常渴望；极需要的。故选D。
15.考查动词。A. settled：解决；B. hidden：隐藏；C. defeated：打败；D. gone：离开。根据前文“When we meet troubles or problems in our lives”可知，遇到的是问题和麻烦，所以要解决的也是问题或麻烦。故选A。
16.考查名词。A. message：信息；B. story：故事；C. problem：问题；D. case：情况，案例。根据后文“I once heard about a family having dinner at a Chinese restaurant”的讲述，作者应是想到了一个听说过的故事。故选B。
17.考查动词。句意：用餐结束时，每个人都打开幸运饼干，大声读出自己的纸条。A. ate：吃；B. tasted：品尝；C. touched：触摸；D. opened：打开。根据后文fortune cookie可知，应是中餐馆给客人的，包有预测未来运气小纸条的幸运饼干，因此打开之后才能看到其中的小纸条上的内容。故选D。
18.考查副词。A. Anyhow：无论如何；B. However：然而；C. Otherwise：否则；D. Therefore：因此。根据前文“everyone 17 their fortune cookie and read their messages out loud.”可知，每个人都读了自己的小纸条，空后“the youngest child did not”提及的最小的孩子没有读，因此，前后句应是转折关系。故选B。
19.考查动词。句意：这种情况发生了好几次，妈妈才拦住她问。A. changed：改变；B. ran：奔跑；C. happened：发生；D. showed：展示。分析可知，句中主语This应指前文提及的“to get another fortune cookie”这件事，且结合后文“several times before the mom stopped her and asked”可知，这个动作发生了不止一次才引起了妈妈的注意和询问。故选C。
20.考查形容词。A. good：好的；B. bad：坏的；C. wrong：错误的；D. right：正确的，最好的。根据后文“When 22 are not going our way, we may 23 the right fortune.”中提及right fortune可知，本句中应是right fortune。故选D。
21.考查动词。句意：你只需要知道一件事，而且不是在幸运饼里。A. doubt：怀疑；B. guess：猜测；C. know：知道，懂得；D. hope：希望。根据后文“That is where there is a will there’s a way.”可知，这是妈妈希望这个小孩子能够懂得的道理。故选C。
22.考查名词。A. memories：记忆；B. things：东西，事情；C. questions：问题；D. chances：机会。结合文章主旨可知，本句是在表达事情不是按照自己的预想方式发展，且对应前文“everything will be 15 and get better.”提及的everything，设空处主语应是things。故选B。
23.考查动词短语。句意：当事情不顺心时，我们可能会寻找“好运气”。A. search for：寻找；B. make up：构成，编造，弥补；C. take out：除掉；D. wrestle with：全力对付。因此此处应是寻找（search for）right fortune。故选A。
24.考查名词。句意：我们对未来寄予它会比现在更好的希望。A. family：家庭；B. work：工作；C. business：商业，生意，要事；D. future：未来。根据后文“so that it will be better than the present.”（以便它会比现在要更好）可知，应是对未来寄予希望。故选D
25.考查形容词。句意：在那个时候，一切对他们来说都是困难的，但是他们并没有失去希望，相反，他们积极地适应了新的环境。A. easy：容易的；B. difficult：困难的；C. common：普遍的；D. special：特殊的。根据前文“Once the Israelis were expelled in a foreign country against their will.”可知，他们被驱逐，因此日子不好过。故选B。
26.考查动词。A. adjusted：调整；B. turned：转动；C. stuck：使扎入，坚持；D. agreed：同意。根据前文“they didn’t lose hope”可知，他们虽然被驱逐，但是没有放弃希望，因此可推知，他们是在新环境中积极调整自己。固定短语adjust to意为调整以适应。故选A。
27.考查动词。句意：多年以后，他们如预期的那样回到了祖国。A. left：离开；B. expected：期望；C. talked：谈话；D. remembered：记得。固定句式as sb. had expected：正如某人所期望的。故选B。
28.考查动词。句意：它证明了好的事情确实会从坏的和困难的情况中产生。A. prove：证明是；B. tell：告诉；C. consider：考虑，认为；D. understand：理解，懂得。固定句式it proves that+从句：它证明了……。故选A。
四、语法填空
【答案】
29. to deal 30. ends 31. thrown 32. they 33. gave
34. that 35. intelligent 36. an 37. establish 38. with
【解析】本文是一篇新闻报道，介绍了法国一家主题公园推出了一种新的环保方式来处理垃圾——训练白嘴鸦在公园建垃圾。
29.考查不定式。句意：法国一家主题公园推出了一种新的环保方式来处理垃圾。way后常接不定式作后置定语，表示“……的方法”，故填to deal。
30.考查名词。句意：这些鸟经过训练，能够捡起烟头、纸和其他扔在地上的东西。cigarette end表示烟头，是可数名词，此处用复数表泛指，故填ends。
31.考查非谓语动词。things与throw之间是逻辑上的动宾关系，表示被动，用过去分词作后置定语，故填thrown。
32.考查代词。句意：鸟儿捡的垃圾越多，它们得到的食物就越多。此处指代the birds并在句中作主语，故填they。
33.考查时态。句意：公园负责人给出了使用白嘴鸦（捡垃圾）的几个理由。讲述的是过去的事情，应该用一般过去时，故填gave。
34.考查宾语从句。句意：我们的目标不仅仅是清理垃圾，同时也为了证明自然本身可以教会我们保护环境。此处为宾语从句，从句成分完整，所以用that只起连接作用，无实义，故填that。
35.考查形容词。句意：白嘴鸦善于交际，并且很聪明。此处与sociable并列用形容词作表语，故填intelligent。
36.考查冠词。不可数名词atmosphere前有形容词时，常用不定冠词修饰，affectionate以元音音素开头，故填an。
37.考查不定式。like to do sth.表示喜欢做某事，前面已经有了不定式符号to，故填establish。
38.考查介词。它们能在45分钟内装满一桶垃圾。fill sth. with...表示“用……装满……”，故填with。
应用文写作
【范文】
Dear Henry,
I’m happy to receive your letter and know that you’re coming to China. I’m writing to sincerely express my warmest welcome.
I’d like to tell you something about some places of interest in China. Personally, one of the best is the Great Wall of China. It came into being during the Warring States period and reached its best in Ming Dynasty as defence working against enemies. With a history of over 2,000 years, it runs like a huge dragon across North China. And now it’s a world-famous tourist attraction. As an old Chinese saying goes, “A man who hasn’t been to the Great Wall is not a true man.” It’s almost a must for foreigners to visit in China.
If you come to visit the Great Wall, you’d better come a day before climbing the Wall and avoid weekends or holidays, when it is too crowded with tourists, so as to enjoy its beauty more peacefully. Moreover, I can be your guide if you like.
Yours,
Li Hua
【解析】这是一封推荐信。题干中给出了写作中需要包含的三个方面，但是第二个和第三个方面提示很简单，需要同学们根据自己的文化积累适当发挥。
第一步：审题：确定时态和人称。这封信主要是要求你作为李华向美国朋友Henry介绍一个中国的景点，所以时态应以一般现在时为主，人称以第三人称和第一人称为主。
第二步：列提纲（重点词组）
express my warmest welcome（表达我最热烈的欢迎）；places of interest（旅游景点）；come into being（存在）；the Warring States period（战国时代）；defence working against enemies（对抗敌人的防御）；a world-famous tourist attraction（举世闻名的旅游景点）；a must for...（对……是必须的）；be crowded with（充满）等。
第三步：遣词造句。同学们在写作时不能逐句翻译，可以适当增加细节，以使行文连贯，同时要点表述要完整，文章要通顺，准确使用时态和语态。
第四步：连句成文。写作时要适当使用连词、过渡词和插入语，使文章浑然一体。同时恰当而合理地使用一些高级词汇和句型，如定语从句等，以提高文章档次。
六、读后续写
【范文】
Paragraph l:
He stood at the top of the steps for one long frightful moment. Running away in shame seemed like the easiest response. But he didn’t run. Somehow, he found his determination. He’d come this far, after all. He’d worked really hard to make this costume, and he was proud of it. He took a deep breath and walked onto the dance floor.
Paragraph 2:
As he moved into the crowd, a silence fell. The dancing stopped. The other guests gathered around Arthur. Finally someone asked him what on earth he was. He bowed deeply and announced, “I am the court lobster.” Everybody laughed out of joy. They loved him. They loved his sweetness, his weirdness, his giant red claws, and his skinny legs in his bright tights. He made the party. He danced with many fancy nobles in fancy clothes and had great fun.
【解析】Arthur在咖啡馆遇到了一些贵族，他们邀请他参加化妆舞会，于是他穿着盛装到达舞会现场，却发现他弄错了，这次的化妆舞会有一个主题——中世纪宫廷，很显然他穿的衣服不符合舞会的主题。续写在这种情况下，他来不及在去换衣服，他如何应对这种场面，要求进行合理的推理写出合乎逻辑的下文。
【名师点睛】
1.通读全文，读懂原文
通读全文首先要解决好五个W和一个H的问题，即理清人物who、地点where、时间when、事件what、原因why及怎样发展how。
2.构思情节，谋篇布局
按照原文中事件发生的逻辑性，构思好情节发展，这个发展须符合情节内在的逻辑。因为这不是写科幻小说，不是写神话，因此应该符合现实发生的真实性。所以这个环节的主要任务是谋篇布局。依照符合故事情节发展的内在逻辑推进下去。所写的第一段和第二段要衔接紧密，相互关联，不能独立存在。
3.理清逻辑，优化语言
这一部分侧重点为语言逻辑，词句结构都必须符合故事中的情景。写作不必追求高大上的词汇，相反，朴实自然、地道、贴切的词语便是好的词语。续写要抓住续这一核心，按照情节的发展进行延续，写作手法上必须以叙为主，描写上以动作描写为重心，情节的发展合乎逻辑地推进。