prep08 CR2 109

Doodle_

109.     （果因）

Thoughsucking 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 greatlyreduce the duration of colds.  Since thegel contains zinc in the same form and concentration as the lozenges, thegreater effectiveness of the gel must be due to the fact that cold viruses tendto concentrate in the nose, not the mouth.

Whichof the following, if true, most seriously weakens the argument?

A.Experimental subjects who used the zinc gel not only had colds of shorterduration but also had less severe symptoms than did those who used a gel thatdid not contain zinc.

B.The mechanism by which zinc affects the viruses that cause the common cold hasnot been conclusively established.

C.To make them palatable, zinc lozenges generally contain other ingredients, suchas 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 appliedwithin 48 hours of the initial onset of cold symptoms.

E.Drug-company researchers experimenting with a nasal spray based on zinc havefound that it has much the same effect on colds as the gel does.

我理解此题是果因，但类比呢？感觉类比也可以啊，二者有相似点： the gel contains zinc in the same form and concentration as the lozenges
请教NN们~~

brfmzbjz

again, 不要纠结于分类，因为分类不是绝对的

果因-->提出其他的原因来说明结果，可以造成削弱
类比-->吃的药和吸的药产生不同的效果，原因在于他们有一个区别(吃的药里有别的成分影响药性）

Doodle_

嗯不纠结于此了 做出来就好 谢谢