备战2023高考英语2022年各地模拟试卷七选五试题汇编
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【6】话题:蚊子咬人为什么会痒、怎么办?
题目来源:广东省2023届高三六校第二次联考
If you've ever been bitten by a mosquito,you know how frustrating their bites can be.36,creating an itch
(that once you start scratching only seems to get worse.Why does a mosquito bite itch and what can we do
Why does a mosquito bite itch
When a mosquito bites you,it pierces the skin using a special mouthpart to suck up blood and injects saliva(
)into your skin.Mosquitoes'saliva has lots of proteins in it,some of which our body recognizes as foreign,and
our immune cells spring into action to try to fight them.37.It's actually the body's response to the foreign
mosquito protein it is trying to fight.That's why some people may only have a mild reaction to bites,while others,
more sensitive to the foreign protein,react with large areas of swelling that are more painful.
What helps resist the urge to scratch
"Don't scratch"'is the advice that most experts and health professionals give.As hard and sometimes unrealistic
as it can sound,scratching inflames(发炎)the skin,and the inflammation makes the skin itch more..“38_”
warned Daniel Markowski,technical adviser for the American Mosquito Control Association,adding that in extreme
cases,people can scar themselves.
Instead,there are dozens of creams and sprays that promise itch relief as well as home remedy ()Choose
what's right for you can often come down to trial and error.In general,all of the various anti-itch creams are very
similar.There is no scientific evidence these remedies work,and they can come with their own precautions or side
effects.39.
40
Some people can have serious allergic reactions to mosquitoes,although in practice it is rare,Vosshall said.If
you experience severe symptoms such as breathing trouble,you should seek medical attention immediately.
A.When to seek medical attention
B.What to do with a mosquito bite
C.It's not the bite that causes the itch
D.The more you scratch,the more they itch
E.The little red bumps swell up almost immediately
F.Scratching can cause secondary infections and prolong the irritation
G.In fact,the best remedy to fight the itch is to prevent a bite in the first place