[单项选择]Nobody can be really free from the sound. Whether we live in the middle of a modem city or a faraway village, we are surrounded by sound every day such as the sounds from television and radio, household appliances, and traffic. Sound makes up a part of our life.
In fact, most of us can not bear total silence. Sound gives us a sense of safety and brings us joy. Scientific tests have also proved that total silence is a very frightening experience for human beings. A recent report shows that people feel quite lonely without background sound while they are working. The background sound which doesn’t change too much may even help people to concentrate.
However, sometimes, sound is not helpful and joyful in people’s life. Normally, we hear these sounds at safe levels that do not affect our hearing. However, when we are exposed to harmful noise--the sounds that are too loud or loud sounds that last a long time, sensitive structures in our inner ear can be damaged, causing hearin
A. headache.
B. fatigue
C. psychosis
D. deafness

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[单项选择]Nobody can be really free from the sound. Whether we live in the middle of a modem city or a faraway village, we are surrounded by sound every day such as the sounds from television and radio, household appliances, and traffic. Sound makes up a part of our life.
In fact, most of us can not bear total silence. Sound gives us a sense of safety and brings us joy. Scientific tests have also proved that total silence is a very frightening experience for human beings. A recent report shows that people feel quite lonely without background sound while they are working. The background sound which doesn’t change too much may even help people to concentrate.
However, sometimes, sound is not helpful and joyful in people’s life. Normally, we hear these sounds at safe levels that do not affect our hearing. However, when we are exposed to harmful noise--the sounds that are too loud or loud sounds that last a long time, sensitive structures in our inner ear can be damaged, causing hearin
A. sound is requisite in our life.
B. total silence does not really exist.
C. the background sound will distract our attention.
D. people had better work in an environment without any sound.

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[简答题]Free from particular average

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[填空题]A really powerful speaker can work _____ the feeling of the crowd to a fever of excitement.

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　　A land free from destruction, wealth, natural resources, and labor supply--all these were important{{U}} (21) {{/U}}in helping England to become the center for the Industrial Revolution.{{U}} (22) {{/U}}they were not enough. Something{{U}} (23) {{/U}}was needed to start the industrial process. That "something special", was men{{U}} (24) {{/U}}individuals who could invent machines, find new{{U}} (25) {{/U}}of power, and establish business organizations to reshape the society.
The men who{{U}} (26) {{/U}}the machines of the Industrial Revolution{{U}} (27) {{/U}}from many backgrounds and many occupations. Many of them were{{U}} (28) {{/U}}inventors than scientists, A man who is a{{U}} (29) {{/U}}scientist is primarily interested in doing his research{{U}} (30) {{/U}}. He is not necessarily working{{U}} (31) {{/U}}that his
A. of
B. to
C. with
D. as

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