191. A substance derived from the Madagascar periwinkle, which has proved useful in decreasing mortality among young leukemia patients, is cultivated in
(A) A substance derived from the Madagascar periwinkle, which has proved useful in decreasing mortality among young leukemia patients,
(B) A derivative, which has proved useful in decreasing mortality among young leukemia patients, of the Madagascar periwinkle,
(C) A Madagascar periwinkle derivative, which has proved useful in decreasing mortality among young leukemia patients,
(D) The Madagascar periwinkle has a derivative which has proved useful in decreasing mortality among young leukemia patients, that(E)
(E) The Madagascar periwinkle, a derivative of which has proved useful in decreasing mortality among young leukemia patients,
此题为何不选B?如果就意思来讲,似乎B较E更接近原题意啊。
E中,MP is cultivated . B中, derivative is cultivated.
请指教。
de·riv·a·tive
adj.
你能说某种草药种植,不能说,某种化合物种植吧,
就象是你可以种花,但是不能种精油,虽然精油是从植物中提炼出来的。
MP而不是derivative被cultivated,所以B肯定是错的
呵呵,我对derivative的理解狭隘了
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