请教gwd7-q21

leahliu

Which of the following most logically completes the passage?

Each species of moth has an optimal body temperature for effective flight, and when air temperatures fall much below that temperature, the moths typically have to remain inactive on vegetation for extended periods, leaving them highly vulnerable to predators.  In general, larger moths can fly faster than smaller ones and hence have a better chance of evading flying predators, but they also have higher optimal body temperatures, which explains why ______.

A.    large moths are generally able to maneuver better in flight than smaller moths

B.    large moths are proportionally much more common in warm climates than in cool climates

C.    small moths are more likely than large moths to be effectively camouflaged while on vegetation

D.    large moths typically have wings that are larger in proportion to their body size than smaller moths do

E.     most predators of moths prey not only on several different species of moth but also on various species of other insects

 (b)

多谢了

xfi883

原题大意：

如果体温低于要求水平，moth非常容易被捕杀

大moth对体温要求更高，但更容易躲避捕杀，是因为——

答案B：大moth生活在温带地区，可以维持体温需求，躲避捕杀。

xiaolishally

后句主要讲大moth,而且讲they also have higher optimal body temperatures====》large moths are proportionally much more common in warm climates than in cool climates

leahliu

哦，明白了，我总觉的有个but，应该句意有转折，后面应该写大moth也容易被捕，是我自己先入为主了，所以觉得那个答案都不对，多谢多谢！