【人教版】九年级全册 Unit 6 When was it invented 单元话题阅读与写作 同步习题课件

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Time is very important to us. When and by
whom were the watches or clocks 1 Perhaps
nobody knows. How could we tell time if there
were no watches or clocks anywhere in the world
The 2 was probably the worlds fi
rs
clock, except in the far north, where the
Eskimos live. There, it's dark most of the winter
and 3 most of the summer but 4 most of
the world, people have used the sun for day
you dont have a clock that shows time, you still
know that when the sun shines, it's day, and when
ts dark, it's night. The sun can not only tell you
whether it's day or night but also tell you whether
it's morning, noon, or afternoon. When the sun is
almost directly overhead, its 6
People who live near the sea know time from
the tides(潮汐). In the daytime, for about six
hours, the water rises 7 on the beach. the
same thing 8 again at night. There are two
high tides and two 9 tides every 24 hours.
In some places in the world the wind comes up
at about the same time every day or changes
direction or stops 10. In these places the wind
can be the clock