Proposals for extending the United States school year to bring it more in line with its European and Japanese counterparts are often met with the objection that curtailing the schools’ three-month summer vacation would violate an established United States tradition dating from the nineteenth century. However, this object misses its mark. True, in the nineteenth century the majority of schools closed for three months every summer, but only because they were in rural areas where successful harvests depended on children’s labor. If any policy could be justified by those appeals to tradition, it would be the policy of determining the length of the school year according to the needs of the economy.
The argument counters the objection by

单项选择题Why should the government, rather than industry or universities, provide the money to put a network of supercomputers in place Because there is a range of problems that can be attacked only with the massive data-managing capacity of a supercomputer network. No business or university has the resources to purchase by itself enough machines for a whole network, and no business or university wants to invest in a part of a network if no mechanism exists for coordinating establishment of the network as a whole. Which one of the following indicates a weakness in the argument

单项选择题If a society encourages freedom of thought and expression, then, during the time when it does so, creativity will flourish in that society. In the United States creativity flourished during the eighteenth century. It is clear, therefore, that freedom of thought was encouraged in the United States during the eighteenth century. An error of reasoning of the same kind as one contained in the passage is present in each of the following arguments EXCEPT: