According to the passage, one of the causes fur the difficulties of American higher education is that ______.
A. the government has stopped giving public institutions as much financial support as it used to
B. America has always been encouraging young people to go to college
C. many public institutions have replaced private ones
D. the government only finances such researches as that of placing man on the moon
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Where there is no product yet meeting a need, the opportunities are unlimited.
A. 在迄今还没有产品来满足需求的领域，其机遇是很多的。
B. 哪个地方没有产品与需求搭配时，哪个地方机会是没有被限定的。
C. 当产品没有满足需求时，机会是不被限定的。
D. 在没有产品与一个需求搭配时，机遇是无限的。
What does the author think about trying to find weaknesses in other people's research
A. It should only be attempted by experienced researchers.
B. It may cause researchers to avoid publishing good work.
C. It is currently being done to excess.
D. It can be useful in planning future researc
The following qualifications are required from the candidates for the above position.
A. 我们要求应聘高职位的求职者需具备以下资历。
B. 应聘以上职位，需具备下列资格。
C. 候选人为了高职位要求自己具备以下资历。
D. 以下资历是对应聘此职位的候选人的要求。
The phrase "impinge on" most probably means ______.
A. promote
B. rely on
C. have an impact on
D. block
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