Neither a rising standard of living nor balanced trade,by itself,establishes a country's ability to compete in the international marketplace.Both are required simultaneously since standards of living can rise because of growing trade deficits and trade can be balanced by means of a decline in cuontry's standards of living.
If the facts stated in the passage above are true,a proper test of a country'a ability to be competitive is its ability to
A. balance its trade while its standard of living rises
B.blance its trade while its standard of living falls
C.increase trade deficits while its standard of living rises
D.decrease trade deficits while its standard of living falls
E.keep its standard of living contant while trade deficits rise
（A）
答案我明白, 可是题目里面的那个
since standards of living can rise because of growing trade deficits and trade can be balanced by means of a decline in cuontry's standards of living.
这又是怎么回师呢?这么说对?
1.做逻辑题切忌去怀疑题目，题目说是true的，你就坚信它一定是true的。
2.本题的这个推理可以简单理解如下：
财政赤字＝进口额－出口额。财政赤字为正时，进口额大于出口额，也就是说进口的东西比出口的东西多，那老百姓的生活水平不就上去了么。反之亦然。
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