问两道结论题，结论题突然有点没方向啊

miguel29 · 发表于 2010-11-16 10:57:51

1，Parasitic wasps lay their eggs directly into the eggs of various host insects in exactly the right numbers for any suitbale size of host egg. If they laid too many eggs in a host egg, the developing wasp larvea would compete withe each other to the death for nutrients and space. If too few eggs were laid, portions of the host egg would deacy, killing the wasp larve.

which of following conclusions can properly be drawn from the information above?
答案是：Host insects lack any effective defenses against the form of predation practiced by parasitic wasps.
为什么不是这个答案：Parasitici wasps learn from experience how many eggs to lay into the eggs of different host species.

2，Increase in the level of high-density lipoprotein in the human bloodstream lower bloodstream-cholesterol levels by increasing the body's capacity to rid itself of excess cholesterol. Levels of HDL in thhe bloodstream of some individuals are signifcantly increased by a program of regular exercise and weight reduction.

which of the following can be correctly inferred from the statements above?
答案是：Individuals who are underweight do not run any risk of developing high levels of cholesterol in the bloodstream.

为什么不是这个答案啊：A program of regular exercise and weight reduction lowers cholesterol levels in the bloodstream of some individual.

顺便谁能给我连接什么的，好让我看看，结论题到底怎么个做法。。看了高威老师的PPT，他说出现新名词就不是正确选项，那象这个第一道题，不就出现了新名词吗？

sdcar2010 · 发表于 2010-11-16 11:10:28

For inference question, the answer cannot contain outside information. Parasitic wasps can learn from their experience would be new information (if true, could be a paper leading to Nobel Prize!). The right answer perfectly summarized what has been explained in the stimulus.

In the second question, the one your chose was right and the official answer was wrong.

miguel29 · 发表于 2010-11-16 12:25:04

恩，谢啦。。不过我前面答案好像对错了。。。

sdcar2010 · 发表于 2010-11-16 12:27:51

In that case, just forget my comment on the right answer for problem 1.

miguel29 · 发表于 2010-11-16 13:24:25

恩，谢谢啦。。

fudanwyh · 发表于 2010-11-18 08:15:51

then what is the right answer for the first one?

miguel29 · 发表于 2010-11-18 09:41:09

第一题正确答案是：The size of the smallest host egg hat a wasp could theoretically parasitize can be determined from the wasp's egg-laying behavior.

问两道结论题，结论题突然有点没方向啊

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