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A bit of rain and wind in summer can be nice. But bad storms are a bit different.
Some of the worst storms are typhoons
（台风）. Every year,about 80 typhoons hit different places around the world, The strongest ones are usually around the Pacific Ocean and the South China Sea. Most happed in July, August and September.Why? When lots of seawater gets hot in the sun,it evaporates
（蒸发）into the air. This makes the air hotter, too. When the air gets warm enough, it starts to move higher up into the sky. Then, cooler air around it rushes in to fill the space that is left. Once the air gets warmer, it starts to move more quickly, making wind. The wind goes in circles, and it keeps moving higher in the sky. The warmer the air gets, the more quickly the wind moves. And when the wind moves faster than 30 meters a second, a typhoons begins.A typhoon has two parts. One is called the
“eye”. This is right in the middle of a trphoon and is calm. The eye of a typhoon can be about 40 kilometers wide. In the eye, the wind does not move so fast, and there are not many clouds in the sky. The other part of a typhoon is the wall of clouds around the eye. This is where the strongest winds and hardest rains are.Typhoons are very dangerous. They blow away houses and cars. And they can also kill people! Typhoons' hard rains are bad for farmers' fields.
(1) How many typhoons hit different places around the world every year?
[ ]
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A ．80 |
B ．40 |
C ．30 |
(2) Where usually has the strongest typhoons all over the world?
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A ．Pacific Ocean |
B ．South China Sea |
C ．both A and B |
(3) What will happen to the seawater when it gets hot in summer?
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A
．it will disappearB
．it will evaporateC
．not mentioned in the passage(4) What is the other part of the typhoon?
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A
．the wall of wind around the eyeB
．the wall of clouds around the eyeC
．the wall of air around the eye(5)
When do typhoons often happen around the year?[ ]
A
．September, October and NovemberB
．July, August and SeptemberC
．June, July and August 查看习题详情和答案>>完形填空
After yesterday's fine sunny weather in Harbin, today __1____ much more like a June day.
Very strong winds will _2___ rain to Qiqihar and most of northern Heilongjiang in the morning. These winds will die away during the afternoon to give a cool clear night. __3__ Heilongjiangsuch as Mudanjiang, Jiamusi, Heihe and Harbin will __4__ a dry day, and in the southeast, the temperature will be higher than normal（正常的）__5__ this time of year. The evening will be ___6____ cold with slight（轻微的）wind at times. The temperature will ___7____ about 20.
Tomorrow will be a ___8____ day with rain everywhere until around noon. In the afternoon the rain will clear from the southwest, bringing fine __9____ to all parts and there may be some sun in the southeast of Heilongjiang. The temperature will become ___10___ in the night
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(1) A．feel |
B．will feel |
C．has |
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(2) A．take |
B．bring |
C．carry |
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(3) A．The part of |
B．The place of |
C．The rest of |
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(4) A．become |
B．lie |
C．have |
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(5) A．to |
B．in |
C．for |
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(6) A．little |
B．few |
C．a little |
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(7) A．shine |
B．break |
C．stay |
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(8) A．cloudy |
B．nice |
C．sunny |
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(9) A．cloud |
B．night |
C．weather |
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(10) A．warm |
B．low |
C．cool |
Reading comprehension.
Trees are very useful to men in three important ways: they supply them with wood and other products; they give them shade; and they help to prevent drought and floods.
Unluckily, in many parts of the world, people have not realized the third of these services is the most important. In their eagerness to make money from trees, some people have cut trees down in large numbers, only to find that they have lost the best friends they had. And besides, they are usually too careless to plant and look after new trees, so the forests solely disappear.
This does not only mean that men will have fewer trees. The results are even more serious: where there are trees, their roots break up soil--allowing the rain to sink in--and also bind the soil, preventing it from being washed away easily; but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich top--soil. When all the top--soil is gone, nothing stays but worthless desert.
Choose the best answer:
(1) The most important service of trees to men is that they ________.
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A
．help them to make moneyB
．give them shade and coolC
．help them to prevent drought and floodsD
．give them wood and other products(2) In many places forests slowly disappear because ________.
[ ]
A
．many trees have been cut downB
．new trees are not well looked afterC
．men haven't planted enough treesD
．all of the above(3) Land becomes desert after all trees are cut down because ________.
[ ]
A
．tree roots break up the soilB
．the rich top--soil will be carried away by floodsC
．of strong windsD
．there is too much rain(4) Some people cut down a large number of trees because ________.
[ ]
A
．they were eager to get wood from themB
．they were eager to make money from themC
．they didn't realize the importance of themD
．both B and C(5) Which of the following is not true?
[ ]
A
．Tree roots can make the top--soil rich and the ground hard.B
．Trees can prevent drought and floods.C
．Tree roots can break up soil.D
．Trees can make the rain sink into the ground. 查看习题详情和答案>>
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