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新素材 科普知识 How could we tell time if there were no watches or clocks anywhere in the world?
The sun might be the world’s first “clock”, except in the far north, where the Eskimos(爱斯基摩人) live. There, it’s dark most of the winter, and light most of the summer. But in most of the world, if you don’t have a clock that shows time, you still know that when the sun shines, it’s day, and when it’s dark, it’s night. The sun can not only tell you whether(是否) it’s day or night but also it’s morning, noon, or afternoon. When the sun is almost directly(恰好) overhead, it’s noon.
People who live near the sea learn from the tides(潮汐). In the daytime, for about six hours, the water rises higher and higher on the beach. And then it goes down and down for about six hours. The same thing happens again at night. There are two high tides and two low tides every 24 hours.
Seamen(水手) on a ship know time by looking at the moon and the stars. The whole sky is their clock.
In some places in the world the wind comes up at about the same time every day or changes direction or stops blowing. In these places the wind can be the clock.
A sand clock is an even better clock. If you had fine dry sand in a glass container like the one in the picture, you would have what is called an hourglass(沙漏). The sand in the hourglass goes from the top part to the bottom part in one hour. When the hourglass is turned over, the sand will take another hour to go back again.
( )1. From the passage we can know there are ________ ways to tell time except the clock and watch.
A. 3 B. 4 C. 5 D. 7
( )2. The Eskimos in the far north can’t use the sun for a clock because ________.
A. they know very little about the sun
B. the sun there never goes down in winter
C. it’s too cold for them to go out to watch the sun
D. they have long days during summers and long nights during winters
( )3. Which part of the newspaper may this passage be in?
A. News. B. Science. C. Advertisement. D. Sport.
( )4. What’s the best title for the passage?
A. Different ways to tell time B. How the clock was invented
C. The development of the clock D. A useful machine to tell time
新素材 科普知识 How could we tell time if there were no watches or clocks anywhere in the world?
The sun might be the world’s first “clock”, except in the far north, where the Eskimos(爱斯基摩人) live. There, it’s dark most of the winter, and light most of the summer. But in most of the world, if you don’t have a clock that shows time, you still know that when the sun shines, it’s day, and when it’s dark, it’s night. The sun can not only tell you whether(是否) it’s day or night but also it’s morning, noon, or afternoon. When the sun is almost directly(恰好) overhead, it’s noon.
People who live near the sea learn from the tides(潮汐). In the daytime, for about six hours, the water rises higher and higher on the beach. And then it goes down and down for about six hours. The same thing happens again at night. There are two high tides and two low tides every 24 hours.
Seamen(水手) on a ship know time by looking at the moon and the stars. The whole sky is their clock.
In some places in the world the wind comes up at about the same time every day or changes direction or stops blowing. In these places the wind can be the clock.
A sand clock is an even better clock. If you had fine dry sand in a glass container like the one in the picture, you would have what is called an hourglass(沙漏). The sand in the hourglass goes from the top part to the bottom part in one hour. When the hourglass is turned over, the sand will take another hour to go back again.
( )1. From the passage we can know there are ________ ways to tell time except the clock and watch.
A. 3 B. 4 C. 5 D. 7
( )2. The Eskimos in the far north can’t use the sun for a clock because ________.
A. they know very little about the sun
B. the sun there never goes down in winter
C. it’s too cold for them to go out to watch the sun
D. they have long days during summers and long nights during winters
( )3. Which part of the newspaper may this passage be in?
A. News. B. Science. C. Advertisement. D. Sport.
( )4. What’s the best title for the passage?
A. Different ways to tell time B. How the clock was invented
C. The development of the clock D. A useful machine to tell time
答案：
1. C 【解析】通读全文可知，本文提到 5 种辨别时间的方式，分别是太阳、潮汐、月亮和星星、风、沙漏。
2. D
3. B 【解析】通读全文可知，本文主要向我们科普了几种辨别时间的方式，所以这篇文章可能出现在报纸的“科学”版块。
4. A
2. D
3. B 【解析】通读全文可知，本文主要向我们科普了几种辨别时间的方式，所以这篇文章可能出现在报纸的“科学”版块。
4. A
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