77. Parasitic wasps lay their eggs directly into the eggs of various host insects in exactly the right numbers for any suitable size of host egg．If they laid too many eggs in a host egg，the developing wasp larvae would compete with each other to the death for nutrients and space．If too few eggs were laid，portions of the host egg would decay, killing the wasp larvae．

Which of the following conclusions can properly be drawn from the information above?

(A)  The size of the smallest host egg that a wasp could theoretically parasitize can be determined from the wasp's egg-laying behavior.

(B)  Host insects lack any effective defenses against the form of predation practiced by parasitic wasps．

(C)  Parasitic wasps learn from experience how many eggs to lay into the eggs of different host species．

(D)  Failure to lay enough eggs would lead to the death of the developing wasp larvae more quickly than would laying too many eggs．

(E)  Parasitic wasps use visual clues to calculate the size of a host egg．

这道题目选A，但是我觉得smallest host egg是无关词应该排除。为什么选啊？

78．  Consumer health advocate：Your candy company adds caffeine to your chocolate candy bars so that each one delivers a specified amount of caffeine. Since caffeine is highly addictive，this indicates that you intend to keep your customers addicted．

Candy manufacturer：Our manufacturing process results in there being less caffeine in each chocolate candy bar than in the unprocessed cacao beans from which the chocolate is made．

The candy manufacturer's response is flawed as a refutation of the consumer health advocate's argument because it

(A)  fails to address the issue of whether the level of caffeine in the candy bars sold by the manufacturer is enough to keep people addicted

(B)  assumes without warrant that all unprocessed cacao beans contain a uniform amount of  caffeine

(C)  does not specify exactly how caffeine is lost in the manufacturing process

(D)  treats the consumer health advocate’s argument as though it were about each candy bar rather than about the manufacturer’s candy in general

(E)  merely contradicts the consumer health advocate's conclusion without giving any reason to believe that the advocate’s reasoning is unsound

这道题目选A，为什么啊？谢谢大家。

77. Parasitic wasps lay their eggs directly into the eggs of various host insects in exactly the right numbers for any suitable size of host egg．If they laid too many eggs in a host egg，the developing wasp larvae would compete with each other to the death for nutrients and space．If too few eggs were laid，portions of the host egg would decay, killing the wasp larvae．

Which of the following conclusions can properly be drawn from the information above?

(A)  The size of the smallest host egg that a wasp could theoretically parasitize can be determined from the wasp's egg-laying behavior.

in exactly the right numbers for any suitable size of host egg

任何大小合适的卵：从最大的到最小的．

就可以推出Ａ就是对的

The size of the smallest host egg that a wasp could theoretically parasitize can be determined from the wasp's egg-laying behavior.

78．  Consumer health advocate：Your candy company adds caffeine to your chocolate candy bars so that each one delivers a specified amount of caffeine. Since caffeine is highly addictive，this indicates that you intend to keep your customers addicted．

Candy manufacturer：Our manufacturing process results in there being less caffeine in each chocolate candy bar than in the unprocessed cacao beans from which the chocolate is made．

到底少了多少？（随便说个数吧，２３％比２３．００１％也叫少）少没少到不上瘾的程度？