.1.你们的学校旅行是什么时候?
__________________ iS your school___________ ?
科目:初中英语 来源: 题型:
4. Would you like to go sailing with us? I’m sure you_(have) a wonderful time.
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科目:初中英语 来源: 题型:
49. 这台新电脑不工作了,我不知道能否把钱要回来。
The new computer__________________ . I wonder__________________________________________________ .
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科目:初中英语 来源: 题型:
Wind is the great maker of waves. There are exceptions, such as the tidal (潮汐的)waves sometimes produced by earthquakes under the sea. But the waves most of us know are produced by winds blowing over the sea.
Now before constructing (创立)an imaginary life history of a typical wave, we need to know certain physical things about it. A wave has height, from trough (low point) to crest ( high point). It has length — the distance from this crest (浪尖)to that of the following wave. The period of the wave means the time it takes for succeeding crests to pass a fixed point. None of these things stays the same —for all depend on the wind, on the depth of the water and many other matters.
The water that makes up a wave does not move forward with it across the sea. Each drop of water turns around in a little circle with the passing of the wave, but returns very nearly to its first position. And it is lucky that this is so. For if the huge masses of water that make up a wave actually moved across the sea, sailing would be impossible.
If we want to find the speed of a wave, we may use the following way:
Speed = wavelength x frequency Here, wavelength is the distance between two high points (crests), frequency means the number of cycles per second.
( )10. What causes waves?
A. Earthquakes and nothing else. B. Only wind.
C. Wind causes.most waves. D. Wind causes some waves.
( ) 11. Which of the following is True according to the passage?
A. The water of a wave moves away across the sea.
B. The water of a wave remains almost at the same place.
C. The water of a wave goes with the passing of the wave.
D. The length of a wave means the distance from the top of a wave to the bottom.
( )12. The speed of Wave 1 is 100 cm/s, frequency 10. The frequency of Wave 2 is 300,
while its speed is twice that of Wave 1. Which of the following is right?
A. The wavelengths of the two are the same.
B. The wavelength of Wave 1 is a little longer than that of Wave 2.
C. The wavelength of Wave 2 is longer than that of Wave 1.
D. The wavelength of Wave 1 is much longer than that of Wave 2.
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科目:初中英语 来源: 题型:
1. read the textbook A.听磁带
2. listen to tapes B.练习发音
3. have conversations with C.朗读
4. read aloud D.阅读课本
5. practice pronunciation E.和... 进行对话
6. be patient F.获取中心思想
7. by reading the sentences G.有耐心
8. get the main ideas H.通过读句子
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科目:初中英语 来源: 题型:
( )4.1 felt it hard to keep up with my classmates. But whenever I want to_______________ , my teacher always encourages me to work harder.
A. go on B. run away C. give up D. give back
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