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size of their king's foot or hand. After the king died,they used the new king's foot, and so on.That wasn't a very good
way to measure things,because it wasn't always clear how big or small a thing really was.
People all over the world used the sun and the moon to measure time. However, they all had different numbers of
days in a week and different numbers of hours in a day.
In 1584,a scientist called Simon Stevenius started to think about a set of measures that used the number ten, but no
one was interested in his ideas. About two hundred years later,a group of scientists in France decided to use his ideas.
They thought of ways to measure everything using ten.Some of their ideas weren't popular.One was a new clock which had ten hours a day. Another was a new calendar(日历) which had ten days a week.
The scientists agreed to use meters to measure length and they worked out how long a meter should be. Then they
decided to call one hundredth of a meter a centimeter and a thousand meters a kilometer.
2. How did people measure time in ancient times?
3. Who started to think about a set of measures that used the number ten?
4. When did the French people start to use meters probably?
5. What do people call a thousand meters?
Strange things happen to time when you travel.because the earth is divided(划分) into twenty.four zones(地区).You can have days with more or fewer than twenty-four hours,and weeks with more or fewer than seven days.
If you make a five-day trip across the Atlantic(大西洋)Ocean,your ship enters(进入) a different time zone every day.As you enter each zone,the time changes one hour. Travelling west, you set your clocr back, travelling east, you set it ahead.Each day of your trip has twenty-five or twenty—three hours.
If you travel by ship across the Pacific(太平洋),you cross the international date line(国际日期变更线). The world agrees that this is the point where a new day begins.When you cross the line,you change your calendar(日历) one full day,backward(向后)or forward(向前)。Travelling east, today becomes yesterday;traveling west it is tomorrow.
根据短文内容,回答下面的问题。
1. Why do strange things happen to time when we travel?
2. Is one hour the difference in time between zones?
3. How do you set your clock if you cross the Antlantic Ocean going west?
4. What is the name for the point where a new day begins?
5. What will change when you cross the line?
查看习题详情和答案>>Up close, Stevie Wonder doesn't act like someone who is totally blind. “I never knew what it was like to see. So being blind is no different from seeing, ”Stevie says. Like any person who can see, he goes to the movies and watches TV. (Friends tell him what's happening on the screen(屏幕) .) He turns the lights on and off when he goes into the bathroom. He has even flown a plane.
Stevie opens the first show in the November Rock concerts(音乐会) on Tuesday. Look at the November calendar(日历) below to find out when Stevie and other rock stars will appear.
A calendar is a kind of table because the dates and days of the week are arranged in columns(栏) and rows. A column goes up and down. A row goes from side to side. All the dates in one column fall on the same day of the week. All the dates in one row appear in the same week.
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Use the November Rock calendar to answer the questions below. Choose the best answer.
1.On which day of every week is there no show?
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2.On what date is the Diana Ross Sunday show?
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3.If you want to go to a Saturday night show, whom can you see?
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A.The Bee Gees or Diana Ross
B.Abba or Stevie Wonder
C.Abba or the Bee Gees
D.The Bee Gees or Linda Ronstadt
4.Thanksgiving Day is always on the fourth Thursday of November. Which show can you see on Thanksgiving Day?
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5.Which week has the most shows?
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