1. When (ask) for his views about his job,he said he found it interesting.
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Some scientists say that animals in the ocean are increasingly threatened by noise pollution caused by human beings.
The noise that affects sea creatures comes from a number of hu?man activities. It is caused mainly by industrial underwater explo?sions,ocean drillings,and ship engines. Such noises are added to natural sounds.. These sounds include the breaking of ice fields,underwater earthquakes,and sounds made by animals themselves.
Decibels (分贝) measured in water are different from those measured on land. A noise of one hundred and twenty decibels on land causes pain to human ears. In water,a decibel level of one hundred and ninetyfive would have the same effect.
Some scientists have proposed setting a noise limit of one hundred and twenty decibels in oceans. They have observed that noises at that level can frighten and confuse whales.
A team of American and Canadian scientists discovered that louder noises can seriously injure some animals.
The research team found that powerful underwater explosions were causing whales in the area to lose their hearing. This seriously affected the whales' ability to ex?change information and find their ways. Some of the whales even died. The explo?sions had caused their ears to bleed and become infected.
Many researchers whose work depends on ocean sounds object to a limit of one hundred and twenty decibels. They say such a limit would mean an end to important industrial and scientific research.
Scientists do not know how much and what kinds of noises are harmful to ocean animals. However,many scientists suspect that noise is a greater danger than they believed. They want to prevent noises from harming creatures in the ocean.
1. According to the passage,which of the following is increasingly dangerous to sea creatures?
A. The sound of a car. B. The sound of voices.
C. Manmade noise pollution. D. The sound of steps.
2. According to the passage,natural sounds include all of the following EXCEPT
A. sounds made by animals themselves
B. ocean drillings
C. underwater earthquakes
D. the breaking of ice fields
3. Which of the following is discussed in the third paragraph?
A. The same noise level produces a different effect on land and in the ocean.
B. Different places may have different types of noises.
C. The decibel is not a suitable unit for measuring underwater noises.
D. Different ocean animals may have different reactions to noises.
4. According to the passage,what will scientists most probably do in the future?
A. They will work hard to reduce ocean noise pollution,
B. They will protect the creatures in the ocean from harmful noises.
C. They will try to set a limit of 120 decibels.
D. They will study the effect of ocean noise pollution.
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Shirley Chisholm is 48. (good) known as the first black woman elected to the United States Congress and the first black woman 49. ( run) for President of the United States. However,her life was filled with much more than being the first black woman. All her life,she worked to improve the lives of others.
Shirley's parents had very little money. They wanted 50. daughters to get a good education and to have a better life. 51. Shirley was three years old,her parents sent her and her sisters to live with their grandmother in Barbados. In 1934 Shirley moved back to New York and continued to do very well in school. She 52. (late) graduated from Brooklyn College with honours.
As a young woman,Shirley decided to become a teacher. She believed she 53. improve society by helping children. She 54. (work) for seven years at a child care centre in the Harlem area of New York City.
In 1964, Shirley Chisholm's 55. (politics) career began. She 56. (elect) to the New York State Assembly. In 1968 she announced she would run for the United States Congress. In 1972 Shirley Chisholm announced that she would run for President of the United States. Many people thought it was a strange thing to do. As a black person,she said she did not run for president 57. she expected to win. Instead,she ran to make a point.
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1. 汤姆躲藏在门后面，从那里他可以清楚地听到妈妈的脚步声。
Tom hid himself behind the door, the steps of his mother clearly, (from where +从句)
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3. All his family jumped with joy when he (收到.. 的信息) the famous university.
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7. This kind of plant doesn't need much water? but you have to water it twice (week) .
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1. A new school has been built where there was a church.
A new school has been built where there was a church.
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6. If (operate) according to the instructions,the machine's lifetime can be lengthened.
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