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大全-Ⅰ-3 答案读不懂,

大全--3.
Economies in which a high percentage of resources are invested in research and development show greater growth in the long run than do those in which resources are channeled into consumption. Japanese workers spend a higher percentage of their income investing in research and development than do American workers.

To grow as fast as Japan has in the past three decades, the United States must change the tax code in order to encourage savings and investment and discourage debt.

Which of the following, if true, tends to weaken the argument?

(A) Japanese research is more focused on consumers than is research by American firms.

(B) Class mobility, highly valued in American culture, is encouraged by a growing rather than a stagnant economy.

(C) Studies have shown that countries with high consumption rates prosper in the short run.

(D) Proposed changes to the tax code could involve strict limits on the deduct ability of interest, and increased allowance for research.E

(E) Because a decreasing percentage of the United States is under 40, an age when savings are traditionally low, the savings rate will increase without changes to the tax code.

答案是E, 没有问题,  但画线部分是什么意思呢?  为什么percentage ....... is under 40, an age, 后面又来个an age..

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an age是under 40的同位语,E的意思是说:因为米国40岁以下的人的比

例减少,而40岁以下的人的存款率又很低,所以米国的存款率会增加

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D为什么不对?

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个人感觉D是增强了,changes could involve... and increased...
因为文中说小日本的工人相比于米国工人会更多的把工资投入到研究中,而

题目说米国要提出改变来和小日本一样,问削弱

如D所说,米国的改变可以increased allowance for research的话,那么就

支持了文中的观点

不好意思,说的有点乱....

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