因为马上要考试了，这两天老是来麻烦各位ＣＤer ,每次都能得到及时的答复！真的是非常的感谢和感动阿，再帮我砍一道语法题吧，
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
这道题我是做正确了，但是看解释的时候有点问题啊，比如语法笔记说，not seriously interfere 是个前面的suffice to 并列的，这是如何看出的呢，我怎么觉得，跟同位语中promote也可以并列阿，共同充当同位成分。
而Ｄ中，为什么又是错误的呢，（语法笔记说which 是修饰thromboxane , 所以，which 在这里是没有错的）
期待各位的解答和讨论
not seriously interfere 是个前面的suffice to 并列的，因为句子结构是suffices to block production of ....,but does not seriously interfere with the production of。
D中的a substance to promote blood clotting用to修饰名词，不佳。
马上就要考拉，加油，GOOD LUCK！
Many teenagers undergo stress, but results of a recent study indicate that the patterns of stress that girls experience are more likely to result in depression than are those that boys experience.
(A) are those that boys experience
(B) what boys experience
(C) boys' experience would
(D) boys' stress patterns do
(E) stress patterns of boys
Ｈｉ，palte1983 ,还在不，再帮我看一道把，这道题，为什么不选B 呢，what 难道不可以代表patterns of strss 吗，这样也可以比较对象对等阿。
我感觉B可能引起比较的歧义，what有和depression做比较的嫌疑。
OPEN TO DISCUSS..
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