快考了，问两个prep破解版里的CR

21.？    (28551-!-item-!-188;#058&003690)

Traces of cultivated emmer wheat have been found among the earliest agricultural remains of many archaeological sites in Europe and Asia.  The only place where the wild form of emmer wheat has been found growing is a relatively narrow strip of southwest Asia.  Since the oldest remains of cultivated emmer wheat yet found are from village sites in the same narrow strip, it is clear that emmer wheat was first domesticated somewhere in that strip.

Which of the following, if true, most strengthens the argument?

(A) The present-day distribution of another wild wheat, einkorn, which was also domesticated early in the development of agriculture, covers a much larger area of southwest Asia.

(B) Modern experiments show that wild emmer wheat can easily be domesticated so as to yield nearly as well as traditionally domestic strains.

(C) At the time when emmer wheat was first cultivated, it was the most nutritious of all the varieties of grain that were then cultivated.

(D) In the region containing the strip where wild emmer wheat has been found, climatic conditions have changed very little since before the development of agriculture.

(E) It is very difficult, without genetic testing, to differentiate the wild form of emmer wheat from a closely related wild wheat that also grows in southwest Asia.

答案D，这题我就totally不明白什么意思？题目倒是看的还可以凑合明白，但是选项里我觉得每一个好的。

First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models.  Last year PXC's profits from computer sales were substantially higher than the previous year, although about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.

If the statements above are true, which of the following is most strongly supported by them?

(A) PXC's competitors raised the prices on their computers last year, making PXC computers more attractive to first-time computer buyers.

(B) The number of people buying PXC computers who also bought PXC computer-related products, such as printers, was larger last year than the previous year.

(C) Among computer buyers who bought a PXC computer to replace their existing computer, the proportion who were replacing a computer made by a competitor of PXC was greater last year than the previous year.

(D) The proportion of PXC computers bought by first-time computer buyers was smaller last year than the previous year.

(E) PXC's production costs for its computers were lower last year than they had been the previous year.

这题答案是D。题目明白但是里面明明说了the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged. 所以我就觉得下面对答案没有一个对的了也。

这两道题基本都是对于选项毫无感觉，所以还请大家帮忙给我看看。谢谢啦！！

第二个题我做prep的时候也小想了一会,忽然灵光一现就会了,希望真正考试的时候经常这么灵光现一现

First-time computer buyers buying PXC home computers typically buy models that cost much less and have a smaller profit margin per computer than do PXC computers bought by people replacing their computers with more powerful models.  Last year PXC's profits from computer sales were substantially higher than the previous year, although about the same number of PXC computers were sold and the prices and profit margins for each computer model that PXC sells remained unchanged.

说一个品牌的电脑由两个部分构成:低端+高端

低端的获利好,高端的获利大.如果这个品牌的电脑总数没有变化,两个部分价格也没有变化,那么要获利变大,只有高端的部分比例变大,也就是低端的比例变小.

说一个品牌的电脑由两个部分构成:低端+高端

低端的获利好,高端的获利大.如果这个品牌的电脑总数没有变化,两个部分价格也没有变化,那么要获利变大,只有高端的部分比例变大,也就是低端的比例变小.

哦，明白了，我原来以为是两种电脑了，原来是一种电脑的两个部分，谢谢mm啦！！