It might be supposed that greater
efficiency could be achieved if several people worked together to solve a
problem than if only one individual works on it. Although groups
often may increase the motivation of their members to deal with problems, there
are conflicts arising among members of a group. Problem solving needs the
presence of an effective leader who not only provides direction, but also
permits the orderly, constructive expression of different opinions; much of the
leader’s effort may be devoted to resolving differences. Success in problem
solving also depends on the distribution of ability within a group.
Although groups may reach a greater number of correct solutions, or may
require less time to discover an answer, their efficiency is typically lower
than that achieved by A. the presence of an effective leader B. the best way to collect resources C. everyone to work harder D. more funds
[单项选择] Questions 21-25 are based on the following passage:
Do we need laws that prevent us from
running risks with our lives If so, then perhaps laws are needed prohibiting
the sale of alcoholic drinks. We’ve already tried that. For 13
years, between 1920 and 1933, there were no liquor stores anywhere in the United
States. They were shut down--abolished by an amendment(修正案). After January 20,
1920, there was supposed to be no more manufacturing, selling, or transporting
of "intoxication liquors." Without any more liquor, people could not drink it.
And if they did not drink it, how could they get drunk There would be no more
dangers to the public welfare from drunkenness and alcoholism. It was all very
logical. And yet prohibition of liquor, beer, and wine did not work.
Why Because, law or no law, millions of people still liked to
drink alcohol A. there would be no further danger to the public from alcoholism B. there would be a rise in the cost of alcoholic beverages C. Without liquor, people would not drink D. people would not become drank or create a public nuisance
[单项选择] Questions 11-15 are based on the following passage:
Venus (金星) is known as the earth’s
"twin" because the two planets are so like each other in size. The diameter of
Venus is about 7, 520 miles (12,100 km. ), smaller than that of the earth. No
other planet comes closer to the earth than Venus. At its nearest approach it is
about 25,000,000 miles (40,2000,000 km. ) away. As seen from the
earth, Venus is the first planet or star that can be seen in the western sky in
the evening. At other times, it is the last planet or star that can be seen in
the eastern sky in the morning. When Venus is near its brightest point, it can
be seen in daylight. Early astronomers called the object that appeared in the
evening Hesperus, and Phosphorus in the morning. Later, they realized these two
objects were the same planet. They named it Venus in honor of th A. 24,896 B. 23,613 C. 37,994 D. 25,000,000
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