Wind is the great maker of waves. There are exceptions (例外), such as the tidal (潮汐的) waves sometimes caused by earthquakes under the sea. But the waves most of us know are caused by winds blowing over the sea .
Now let’s learn some physical (自然地理學(xué)的) things about it. A wave has height, from low point to high point . It has length (長度)--the distance from this high point to that of the following wave. The period of the wave means the time it takes for succeeding high points to pass a fixed point. None of these things stays the same--for all depend upon (依靠)the wind, upon the depth (深度) of the water and many other matters.
The water that makes up a wave does not advance 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 original position (原先的位置). And it is lucky that this is so. For if the huge groups of water that make up a wave really 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" × frequency (頻率).
Here, wavelength is the distance between two high points , frequency means the number of cycles per second
【小題1】What causes waves?

A．Earthquakes and nothing else. B．Only wind.
C．Wind causes most waves. D．Wind causes some waves.
【小題2】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.
【小題3】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 equal.
B．The wavelength of Wave 1 is 10 times 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 longer than that of Wave 2.
【小題4】Where can we find this passage?
A．music magazineB．fashion magazineC．scientist magazineD．sports magazine


【小題1】C
【小題2】B
【小題3】D
【小題4】C

解析【小題1】根據(jù)文章內(nèi)容第一段Wind is the great maker of waves. There are exceptions (例外), such as the tidal (潮汐的) waves sometimes caused by earthquakes under the sea.可知答案A和B是錯(cuò)誤的，而根據(jù)文章內(nèi)容第一段But the waves most of us know are caused by winds blowing over the sea .可知答案D是錯(cuò)誤，故選答案為C
【小題2】根據(jù)文章內(nèi)容第三段內(nèi)容The water that makes up a wave does not advance with it across the sea，可知答案A是錯(cuò)誤的；根據(jù)文章內(nèi)容第三段內(nèi)容Each drop of water turns around in a little circle with the passing of the wave, but returns very nearly to its original position (原先的位置).可知答案為B項(xiàng)的說法是正確的，同時(shí)C項(xiàng)的說法是錯(cuò)誤的；又根據(jù)文章第二段的內(nèi)容. A wave has height, from low point to high point，可知答案為D項(xiàng)說明的內(nèi)容是錯(cuò)誤的，故選B
【小題3】根據(jù)文章內(nèi)容第三段的內(nèi)容If we want to find the speed of a wave, we may use the following way : Speed =" wavelength" × frequency (頻率).根據(jù)題目中所給的信息，可知答案為D
【小題4】根據(jù)文章整體的內(nèi)容和文章內(nèi)容第二段內(nèi)容Now let’s learn some physical (自然地理學(xué)的) things about it.可知答案為C，介紹的地理相關(guān)知識(shí)，自然是來自科學(xué)雜志。
考點(diǎn)：本文是節(jié)選自科普的文章，介紹海浪的相關(guān)知識(shí)。
點(diǎn)評(píng)：學(xué)生在做此項(xiàng)閱讀理解時(shí)，要注意專業(yè)知識(shí)的闡述，把握好知識(shí)點(diǎn)。

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：初中英語 來源：江蘇月考題 題型：閱讀理解

閱讀理解。
     As the sun rose, a dewdrop (露珠) woke up.  There it sat on a leaf, catching the sunlight. Proud of its
simple beauty,  it was very happy.  Around it were other dewdrops,  some on the same leaf and some on
other leaves. The dewdrop was sure that it was the best, the most special dewdrop of them all.
     Ah, it was good to be a dewdrop.
     The  wind  blew  and  the plant began to shake,  tipping  (使傾斜)  the leaf . The  dewdrop  became
frightened as it started to move towards the edge (邊緣)of the leaf. Why was this happening? Things were comfortable. Things were safe. Why did they have to change? Why? Why?
     The dewdrop  reached  the edge of th e leaf.  It was sure that this was the end.  The day had only just
begun and the end had come so quickly. It seemed so unfair. It seemed so meaningless. It tried hard to do whatever it could to stay on the leaf, but it was no use.
     Finally, it fell. Below there was a mirror. A reflection of the dewdrop seemed to be coming up to meet
it.  Closer and closer they came together until finally.., the small dewdrop became a part of the great pond (池塘). Now the dewdrop was no more, but it was not destroyed. 
     It had become one with the whole.
1. According to Paragraph 1, we know that the dewdrop _____.
A. didn't get on well with other dewdrops
B. thought its beauty was too simple
C. couldn't get any sunlight
D. thought itself as the best dewdrop
2. The dewdrop became _____ as it started to move towards the edge of the leaf.
A. scared
B. happy
C. proud
D. comfortable
3. Which of the following is TRUE according to the story?
A. There was only one dewdrop on the leaf.
B. The dewdrop did nothing before falling.
C. The mirror in the story refers to the pond.
D. The dewdrop was actually destroyed.
4. What does the underlined word "reflection" mean?
A. 反映
B. 考慮
C. 沉思
D. 倒影
5. The story mainly tells us that _____.
A. we should work together against difficulties
B. people should not be too proud of themselves
C. one should work hard for his/her goals
D. it's good to become one with the whole

查看答案和解析>>

同步練習(xí)冊(cè)答案