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标题: [求助]一道很纠结的题 [打印本页]

作者: doubao2000    时间: 2009-7-7 23:26
标题: [求助]一道很纠结的题

后天就考试了,今天做Prep对这个题始终不理解,求达人讲解一下选C的原因。

In lavoratory 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.

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

D: which is a substance that promotes blood clotting, but does not seriously interfere


作者: aeoluseros    时间: 2009-7-7 23:42

concrete question?

可以先search下prep语法笔记(置顶帖有下载链接).


作者: doubao2000    时间: 2009-7-8 11:08

搜了,可是附件都是打不开。。。。。


作者: xfi883    时间: 2009-7-8 11:54

句子结构:壮语+主句+插入语+but并列从句+定语

A选项存在以下几个问题:

1。句式不简洁

which is 应该省略。

2。but后应是与主句平行的结构。

主句为一个句子,but后也应是一个句子。but not seriously interfering,错。

C选项正确,

1。去掉了which is;

2。but后does与主句surffices对称,由于主语相同,所以but后比较从句可以省略主语。


作者: juneyingmao    时间: 2009-7-8 11:57

是不是因为,如果选D的话,but does not seriously interfere 可能和which is 这个从句并列,也可能和that promotes 这个从句并列,C就只能和that promotes这个从句并列


作者: doubao2000    时间: 2009-7-8 12:37

谢谢楼上两位的讲解,我已经能够找到思路了!

加which is的话,应该是破坏了主句的平行结构。






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