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题库 / Prep2007E1-SC-35
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.
which is a substance that promotes blood clotting, but not seriously interfering
a substance that promotes blood clotting, but not seriously interfering
a substance that promotes blood clotting, but does not seriously interfere
which is a substance to promote blood clotting, but does not seriously interfere
which is a substance that promotes blood clotting, but not a serious interference
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CD的差别在于不定式和从句，promote blood clotting应该作定语修饰substance，因为thromboxane是一种substance对于是否promote没有直接决定关系，从后面平行的which prevents clotting也可以看出来，作定语修饰prostacyclin
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