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标题: 问一个JJ的CR [打印本页]

作者: kennypl 时间: 2006-10-29 09:07
标题: 问一个JJ的CR

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?

Other types of virus have surface proteins that closely resemble proteins found in various organs of mice.
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.
Mice that are infected with a herpesvirus but do not develop keratitis produce as many antibodies as infected mice that do develop keratitis.
There are mice that are unable to form antibodies in response to herpes infections, and these mice survive these infections without ever developing keratitis.
Mice that have never been infected with a herpesvirus can sometimes develop keratitis.

有人解释下吗? 碰到这种有长阅读又难的T实在没办法

作者: lzger2000 时间: 2006-10-29 09:38

条件：如果感染，老鼠就产生抗体；感染了H，（就产生了抗体），同时引发了K。

结论：抗体产生了K。

加强：没有抗体的，就没有K。

[此贴子已经被作者于2006-10-29 9:38:57编辑过]

作者: kennypl 时间: 2006-10-29 10:01
无因无果总反映不过来．．．３Ｑ

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