请教PREP 1-35

tumimi

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

answer is C

我的疑问是为什么不可以是B，这里是什么语法点啊？谢谢

小萧笑

是which is 整体省略了让句子更concise了，that从句里promotes和does not ...并列，用动词，不能一个用动词，一个用分词阿，因为中间有个but.

daizexia90

我觉得C也有问题呀，does not interfere存在歧义，与promotes并列。。。。。。

xiayizhang

D 的意思是修饰 thromboxane 而非aspirin

plmnpler

我也想知道D为什么不对啊？

tumimi

啊，明白了！！多谢啊！

judy_zhaoli

ｓｕｆｆｉｃｅｓ和ｄｏｅｓ　ｎｏｔ　ｉｎｔｅｆｅｒｅ并列

judy_zhaoli

suffices.....interfere并列，要ｐａｒａｌｌｅｌ

BruceNornia

不能...but作为并列关系的连接词 后面的interfering没有与之并列的词