求助

GWD5-Q21:

In Teruvia, the quantity of rice produced per year is currently just large enough to satisfy domestic demand.  Teruvia’s total rice acreage will not be expanded in the foreseeable future, nor will rice yields per acre increase appreciably.  Teruvia’s population, however, will be increasing significantly for years to come.  Clearly, therefore, Teruvia will soon have to begin importing rice.

Which of the following is an assumption on which the argument depends?

1. No pronounced trend of decreasing per capita demand for rice is imminent in Teruvia.

2. Not all of the acreage in Teruvia currently planted with rice is well suited to the cultivation of rice.

3. None of the strains of rice grown in Teruvia are exceptionally high-yielding.

4. There are no populated regions in Teruvia in which the population will not increase.

5. There are no major crops other than rice for which domestic production and domestic demand are currently in balance in Teruvia.

答案是A.不是很理解

A。实际就是另一种说法：这个地区的居民的每人消耗大米的数量不会变化（减少）。

因为种植面积不变，而且每亩产量不变，同时人口增加，如果每人消耗的大米都不变或者增加的话，那肯定要进口了。（反之，如果每人消耗减少，倒是不一定就进口）。

所以A对。