大全I-17 help

       In the past year, there has been a large drop in the number of new cars sold, due to harsh economic conditions in the marketplace and high taxes. At the same time, the average price paid for a new car has risen dramatically.

Which of the following, if true, best explains the increase in the average price of a new car?

(A) The price of used cars has climbed steadily over the past ten years.

(B) There will be a tax reduction later in the year which is expected to aid moderate and low income families.

(C) The market for expensive car has been unaffected by the current economic conditions.

(D) Economic conditions are expected to get significantly worse before the end of the year.（C）

(E) Low demand for trucks and vans has led to lower production in the factories.

为什么是c呢。如果说“价格贵的车没有被现在的经济状况所影响”，那么它的价格就不应该有“dramatically" 的变化啊。怎么会影响购买新车的平均价格呢？还是无法解释文中的现象阿。

请nn指教。

C is the best answer

because of the bad economic condition,the sale of new car has decreased a lot,but the average price of new car has increased a lot.

From the information above, we know that the condition is the less you sale ,the more you earned.So which of the following is the best choice that match the description above? In choice C,we found if the expensive car is what we discussed in this arguement,all the information will seem to be logically cited.

So choice C is the correct answer to the question above

 the less you sale ,the more you earned是站在销售者的立场上说的。

新车买的少，但是平均价不降反升，有一种情况可以解释，那就是车卖的贵了。那什么车能卖的贵呢？很贵的车。

再不理解可以列个公式：车的价值/车的总数＝平均价格

车的总数下降了，如果：车的价值不变，因为分母急剧变小，则平均价也自然急剧变大，如果同时分子也变大，则【平均价也自然急剧变大】的程度将更加大一些而已。

所以只要车的价值维持或者变大都可以得到文章中所表述的情况。

因此C是最符合上述论述的。

终于懂了。thanks a lot

谢谢gong bao