prep 35 请高手指点下

whitebone008 · 发表于 2010-8-29 11:34:36

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 interference

D 选项有何问题？？？

以后再说 · 发表于 2010-8-29 12:26:34

选B？

which be, that be, who be 出现，基本就是啰嗦

cooldavy · 发表于 2010-8-29 15:30:24

我看选C吧，同位语比which从句简洁

本贴相关题目 GMATPrep-2007E1-SC-35 (MKSZ)

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