Our research has focused on a drug which is so______ as to be able to change brain chemistry．

A．powerful

B．influential

C．monstrous

D．vigorous

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参考答案

答案解析

A。我们致力于研究一种非常有效以至于可以改变大脑化学性质的药物。
考查形容词辨析。powerful有“有效的”之意，可以构成偏正搭配powerful dru9；influential意为“有影响的”，monstrous意为“巨大的”，vigorous意为“精力充沛的”，均不符合句意。

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1 根据以下资料，回答题：
        German Chancellor Otto Von Bismarck may be most famous for his military and diplomatic talent, but his legacy includes many of today's social insurance programs．During the middle of the 19th century, Germany, along with other European nations, experienced an unprecedented rash of workplace deaths and accidents as a result of growing industrialization．Motivated in part by Christian compassion for the helpless as well as a practical political impulse to undercut the support of the socialist labor movement, Chancellor Bismarck created the world's first workers' compensation law in 1884．
        By 1908, the United States was the only industrial nation in the world that lacked workers' compensation insurance．America's injured workers could sue for damages in a court of law, but they still faced a number of tough legal barriers．For example, employees had to prove that their injuries directiy resulted from employer negligence and that they themselves were ignorant about potential hazards in the workplace． The first state workers' compensation law in this country passed in 1911, and the program soon spread throughout the nation．
        After World War II, benefit payments to American workers did not keep up with the cost of living．In fact, real benefit levels were lower in the 1970s than they were in the 1940s, and in most states the maximum benefit was below the poverty level for a family of four．In 1970, President Richard Nixon set up a national commission to study the problems of workers' compensation．Two years later, the commission issued 19 key recommendations, including   one that called for increasing compensation benefit levels to 100 percent of the states' average weekly wages．
        In fact, the average compensation benefit in America has climbed from 55 percent of the states' average   weekly wages in 1972 to 97 percent today．But, as most studies show, every 10 percent increase in compensation   benefits results in a 5 percent increase in the numbers of workers who file for claims．And with so much more   money floating in the workers' compensation system, it's not surprising that doctors and lawyers have helped   themselves to a large slice of the growing pie．

The world's first workers' compensation law was introduced by Bismarck

A．to make industrial production safer

B．to speed up the pace of industrialization

C．out of religious and political considerations

D．for fear of losing the support of the socialist labor movement

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2 We learn from the passage that the process of industrialization in Europe ________

A．was accompanied by an increased number of workshop accidents

B．resulted in the development of popular social insurance programs

C．required workers to be aware of the potential dangers at the workplace

D．met growing resistance from laborers working at machines

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3 One of the problems the American injured workers faced in getting compensation in the early 20th century was that ________．

A．they had to have the courage to sue for damages in a court of law

B．different states in the U．S．had totally different compensation programs

C．America's average compensation benefit was much lower than the cost of living

D．they had to produce evidence that their employers were responsible for the accident

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