zinc题~~求解

wellmichelle

Though sucking zinc lozenges has been promoted as a treatment for the common cold, research has revealed no consistent effect. Recently, however, a zinc gel applied nasally has been shown to greatly reduce the duration of colds. Since the gel contains zinc in the same form and concentration as the lozenges, the greater effectiveness of the gel must be due to the fact that cold viruses tend to concentrate in the nose, not the mouth.

Which of the following, if true, most seriously weakens the argument?
A.Experimental subjects who used the zinc gel not only had colds of shorter duration but also had less severe symptoms than did those who used a gel that did not contain zinc.
B.The mechanism by which zinc affects the viruses that cause the common cold has not been conclusively established.
C.To make them palatable, zinc lozenges generally contain other ingredients, such as citric acid, that can interfere with the chemical activity of zinc.
D.No zinc-based cold remedy can have any effect unless it is taken or applied within 48 hours of the initial onset of cold symptoms.
E.Drug-company researchers experimenting with a nasal spray based on zinc have found that it has much the same effect on colds as the gel does.

请问E是什么意思？zinc gel applied nasally 跟gel有什么区别？gel是第三种治疗方法？

Audre

同问E什么意思

HarrisZheng

后面的"as gel does"是什么意思？它到底在比较哪两个？

-- by 会员 wellmichelle (2012/10/4 20:32:21)

比较的是a nasal spray和gel 这两个都是用在鼻腔的 如果功效一样的话 那么就加强结论 细菌在鼻腔比较集中

wellmichelle

后面的"as gel does"是什么意思？它到底在比较哪两个？

HarrisZheng

E是加强结论的

应该选C

wellmichelle

为毛还没有人解答？？哭……

wellmichelle

自己顶上去~~~求解求解！！