1.In response to viral infection, the immune systems of mice typically produce antibodies that destroy the virus by binding to proteins on its surface.  Mice infected with a herpesvirus generally develop keratitis, a degenerative disease affecting part of the eye.  Since proteins on the surface of cells in this part of the eye closely resemble those on the herpesvirus surface, scientists hypothesize that these cases of keratitis are caused by antibodies to herpesvirus.

Which of the following, if true, gives the greatest additional support to the scientists’ hypothesis?
A.   Other types of virus have surface proteins that closely resemble proteins found in various organs of mice.
B.   There are mice that are unable to form antibodies in response to herpes infections, and these mice contract herpes at roughly the same rate as other mice.
C.   Mice that are infected with a herpesvirus but do not develop keratitis produce as many antibodies as infected mice that do develop keratitis.
D.   There are mice that are unable to form antibodies in response to herpes infections, and these mice survive these infections without ever developing keratitis.
E. Mice that have never been infected with a herpesvirus can sometimes develop keratitis.

请问大家答案是选D么  异因异果加强？

2 Plantings of cotton bioengineered to produce its own insecticide against bollworms, a major cause of crop failure, sustained little bollworm damage until this year.  This year the plantings are being seriously damaged by bollworms.  Bollworms, however, are not necessarily developing resistance to the cotton’s insecticide.  Bollworms breed on corn, and last year more corn than usual was planted throughout cotton-growing regions.  So it is likely that the cotton is simply being overwhelmed by corn-bred bollworms.

In evaluating the argument, which of the following would it be most useful to establish?
A.   Whether corn could be bioengineered to produce the insecticide
B.   Whether plantings of cotton that does not produce the insecticide are suffering unusually extensive damage from bollworms this year
C.   Whether other crops that have been bioengineered to produce their own insecticide successfully resist the pests against which the insecticide was to protect them
D.   Whether plantings of bioengineered cotton are frequently damaged by insect pests other than bollworms
E.   Whether there are insecticides that can be used against bollworms that have developed resistance to the insecticide produced by the bioengineered  cotton
此题是否选C

多谢大家帮忙看一下哈~

Q1.D正确是因为无因无果，由于原文中的scientists‘ hypothesis是建立在proteins on the surface of cells in this part of the eye closely resemble those on the herpesvirus surface，而mice typically produce antibodies that destroy the virus by binding to proteins on its surface，所以these cases of keratitis are caused by antibodies to herpesvirus。D选项指出有mice that are unable to form antibodies in response to herpes infections survived,所以说明没有PROTEINS就会without ever developing keratitis。

Q2应该选B，原文的推理是last year more corn than usual was planted throughout cotton-growing regions并且Bollworms bred on corn, however, are not necessarily developing resistance to the cotton’s insecticide,但作者却推测So it is likely that the cotton is simply being overwhelmed by corn-bred bollworms.由于CORN可分为bioengineered or non-bioengineered，所以选项B提出plantings of cotton that does not produce the insecticide是不是遭受了非比寻常的损失来最合适地evaluating the argument

同一楼上。B正确
原文推理：往年生化改造棉一直不怎么受虫害，今年却死得很惨。改造棉的杀虫素没有失效，所以认为是虫子太多了。
B：看看没有改造过的有没有死得更惨
若有——〉说明改造棉还是比较牛，有抗虫作用，就是因为虫子太多了，加强
若无——》改造棉和普通棉一样受灾说明是改造棉的抗虫能力有了变化，而非虫子太多了，削弱