36EX19

avrilcongcongUID: 3313827

The common cold, produced most often by rhinoviruses, is intractable to antiviral defense. A defense against rhinoviruses might nonetheless succeed by exploiting hidden similarities among the rhinovirus strains. For example, most rhinovirus strains bind to the same kind of molecule (delta-receptors) on a cell‘s surface when they attack human cells. Colonno, taking advantage of these common receptors, devised a strategy for blocking the attachment of rhinoviruses to their appropriate receptors. Rather than fruitlessly searching for an antibody that would bind to all rhinoviruses, Colonno realized that an antibody binding to the common receptors of a human cell would prevent rhinoviruses from initiating an infection. Because human cells normally do not develop antibodies to components of their own cells, Colonno injected human cells into mice, which did produce an antibody to the common receptor. In isolated human cells, this antibody proved to be extraordinarily effective at thwarting the rhinovirus. Moreover, when the antibody was given to chimpanzees, it inhibited rhinoviral growth, and in humans it lessened both the severity and duration of cold symptoms.
1. It can be inferred from the passage that a cell
lacking delta-receptors will be
(A) unable to prevent the rhinoviral nucleic acid
from shedding its capsid
(B) defenseless against most strains of rhinovirus
(C) unable to release the viral progeny it develops
after infection
(D) protected from new infections by antibodies
to the rhinovirus
(E) resistant to infection by most strains of
rhinovirus
答案是E，但不明白D项为什么不对？

裤子李UID: 3370014

1.取非题。定位到L6：most rhinovirus strains bind to the same kind of molecule (delta-receptors) on a cell‘s surface when they attack human cells。如果没有molecule (delta-receptors) ，就无法感染，比对答案，选E。D的by后面错了，根据文章可以看出，r感染是通过结合到delta那种表面受体，而没有这种表面受体的话r不会感染，并不是通过一种抗体来使它不感染的。而且这种要取非的题目，找到定位点取非以后多出来的细节就是错的啊！

个人见解，希望有所帮助

avrilcongcongUID: 3313827

裤子李 发表于 2012-9-14 00:34
1.取非题。定位到L6：most rhinovirus strains bind to the same kind of molecule (delta-receptors) on a ...

恩，谢谢，我觉得挺对的~哎，阅读好不稳定，经常两个EX一个错56个，一个23个，还不到一个月了真愁

裤子李UID: 3370014

avrilcongcong 发表于 2012-9-14 18:39
恩，谢谢，我觉得挺对的~哎，阅读好不稳定，经常两个EX一个错56个，一个23个，还不到一个月了真愁

我也是不到一个月，哎。我准备了好多，还是没底。
不过阅读我倒是感觉：不能凭记忆去做，能定位的那些题目。一定要找到定位再做，我就是凭记忆做旧错好多

avrilcongcongUID: 3313827

裤子李 发表于 2012-9-15 14:57
我也是不到一个月，哎。我准备了好多，还是没底。
不过阅读我倒是感觉：不能凭记忆去做，能定位的那些题 ...

我是10月11号的，已经是二战了，从心态上就恐惧这个，哎

裤子李UID: 3370014

avrilcongcong 发表于 2012-9-15 14:58
我是10月11号的，已经是二战了，从心态上就恐惧这个，哎

我也是！！！！！加油吧，我第一次，处！哈
你一战的时候感觉如何？难度那些和联系差的多不多？

avrilcongcongUID: 3313827

裤子李 发表于 2012-9-15 15:01
我也是！！！！！加油吧，我第一次，处！哈
你一战的时候感觉如何？难度那些和联系差的多不多？

我一战还是老G呢，所以也没啥经验的，只是感觉AW可以随缘了，不必花太多时间~

裤子李UID: 3370014

avrilcongcong 发表于 2012-9-15 15:25
我一战还是老G呢，所以也没啥经验的，只是感觉AW可以随缘了，不必花太多时间~

我也是aw随缘了哈哈