求助prep上的一题~!

leelaugh · 发表于 2013-6-5 16:07:58

In laboratory rats, a low dose of aspirin usually suffices to block production of thromboxane, which is a substance that promotes blood clotting, but not seriously interfering with the production of prostacyclin, which prevents clotting.

(A) which is a substance that promotes blood clotting, but not seriously interfering

(B) a substance that promotes blood clotting, but not seriously interfering

(C) a substance that promotes blood clotting, but does not seriously interfere

(D) which is a substance to promote blood clotting, but does not seriously interfere

(E) which is a substance that promotes blood clotting, but not a serious interf18erence
选D的话会不会同which prevents clotting更加平行一点???

enkyklios · 发表于 2013-6-5 19:52:45

D不好but会和 suffices to block production of thromboxane,平行

求助prep上的一题~!

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