Food preference in America is______.
A.cultural
B.inherited
C.individualistic
D.according to ages
第1题
ut 70 decibels. Some of them are very concerned because normal daily life often exposes people to noise levels of about 70 decibels even inside their homes. Cities have always been noisy, but noise is now spreading to areas that were quiet just a few years ago. Clearly, something must be done or noise will seriously and permanently maim the population. Fortunately, the knowledge and methods to control noise already exist. As a matter of fact, this is one instance where the knowledge of control methods exceeds the knowledge about the effects on human life and on the environment. There are two common means for control. The first is reducing noise at its source, and the second is changing the sound path by distance or by shielding. The second approach is being used more often today as people become more aware of the danger of noise. New building codes require better sound insulation in homes and apartments. More and more towns are passing zoning ordinances that try to segregate noisy factories or airports from residential areas. Sound-absorbent materials and construction designed to block sound paths are slowly coming into use in offices and homes. New highways are being built to redirect traffic noise up and away from nearby areas. Aircraft are increasingly being required to use reduced-power flights around airports. There are many examples of available noise control methods that are not being used. More flexible building codes would permits the use of quieter kinds of plumbing pipes. Sound-absorbent materials can reduce the noise of motors and engines. Power generators can be quieted with baffles, exhaust silencers, and sound absorbers. Truck tires can be made with quieter treads. In many cases, the most of building quieter machines is the same or only slightly higher than that of the current noisy ones. Even though the new jumbo jets, for example, are quieter than the older ones, yet they are more powerful and carry twice as many passengers. All of these methods are only partial measures as noisy levels continue to rise. Most specialists in the field agree that much of the solution must come from eliminating some of the noise at its source, therefore saving through prevention the large costs of hearing loss.
The noise level for possible hearing loss begins at about______.
A.30 decibels
B.70 decibels
C.100 decibels
D.none of the above
第2题
【C1】______a few every old women who in their youth have worked【C2】______, with harness round their waists, and a chain【C3】______passed between their legs, crawling on all【C4】______and dragging tugs of coal. They used to go on【C5】______this even when they were pregnant. And【C6】______now, if coal could not be produced without pregnant women dragging it【C7】______and fro, I fancy we should let them do it【C8】______than deprive ourselves of coal. But most of the time, of course, we should【C9】______to forget that they were doing it. It is【C10】______with all types of manual work; it keeps us alive, and we are oblivious of its existence. More than anything【C11】______, perhaps, the miner can stand as the type of manual worker, not only because his work is so exaggeratedly awful, but also because it is so vitally necessary and【C12】______so【C13】______, that we are capable【C14】______forgetting it as we forget the blood in our veins. In【C15】______way it is even humiliating to watch coal miners working. It raises in you a momentary doubt【C16】______your own status as an " intellectual" and a superior person generally. For it is brought【C17】______to you, at least while you are watching, that it is only【C18】______miners sweat their guts out【C19】______superior persons can【C20】______superior.
【C1】
A.alive
B.living
C.walking
D.breathing
第3题
It______me that the man was not telling the truth.
A.affects
B.pokes
C.hits
D.stirs
第4题
The manager______facts and figures to make it seem that company was prosperous.
A.beguiled
B.besmirched
C.juxtaposed
D.juggled
第5题
They managed to______the sound on TV every time the alleges victims name was spoken.
A.deaden
B.deprive
C.punctuate
D.rebuff
第7题
盛顿所面临的障碍比东京政府办公室里的几位权力经纪人还要难以对付。它必须与许多世纪以来所形成的根深蒂固的日本风俗对抗。要想使日本政府改变主意,华盛顿必须让全体日本人改变主意。
第8题
The underlined sentence in Paragraph 7 roughly means that the researchers believe that
A.mutated genes have a negative influence on Ashkenazim"s intelligence
B.mutated genes have played a role in Ashkenazim"s intelligence
C.the Ashkenazim"s high intelligence is caused by the mutated genes
D.the Ashkenazim"s illnesses have greatly handicapped their performance
第9题
According to the authors description, Asimo______.
A.is a four-egged robot
B.seems more like a human being than a machine in action
C.seems more like a machine than a human being in action
D.is in a sort of animal form
第10题
【C10】
A.putting on
B.trying on
C.wearing
D.dressing
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