求解两道大全上的题~~

zxy472820585

1.After a few weeks’ experience, apprentice jewelers can usually begin to discriminate, though not with absolute certainty, genuine diamonds from imitation diamonds.（C）
(A) genuine diamonds from imitation diamonds
(B) genuine diamonds apart from imitations
(C) between genuine diamonds and imitation diamonds
(D) among genuine diamonds and imitation diamonds
(E) whether diamonds are imitation or genuine

2.As part of their therapy, young polio victims learning to live with their disabilities were helped to practice falling during the 1950s, so that they could learn to fall without being hurt.（E）
(A) As part of their therapy, young polio victims learning to live with their disabilities were helped to practice falling during the 1950s
(B) As part of their therapy, young polio victims learning to live during the 1950s with their disabilities were helped to practice falling
(C) Young polio victims learning to live during the 1950s with their disabilities were helped to practice falling as part of their therapy
(D) Young polio victims learning to live with their disabilities were helped to practice falling during the 1950s as part of their therapy
(E) During the 1950s, as part of their therapy, young polio victims learning to live with their disabilities were helped to practice falling

第一道题为什么不能选A呢~~~
第二道题后面的为什么用复数 were呢？不是修饰整句话应该用单数吗？

谢谢各位了

zxy472820585

有没有人知道啊~~~(>_<)~~~  纠结。。。

jeffery2541

刚才查了一下：
discriminate between: Long-range missile attacks simply cannot discriminate between military and civilian targets.

discriminate something from something: It can be difficult to discriminate one sound from another.

这样看AC单纯从语法角度看就对了，是grammatically correct。这样的话就需要感受一下两个结构逻辑上的不同了：
discriminate的意思是区分，辨别，discriminate between是将两者放在一起加以区分，潜在意思是两个范围内的事物分别具有不同的特征可以来区分，而discriminate from则是从M中将N辨别出来，M 应该是genuine diamonds和imitation diamonds的集合，N 是genuine diamonds。

zxy472820585

刚才查了一下：
discriminate between: Long-range missile attacks simply cannot discriminate between military and civilian targets.

discriminate something from something: It can be difficult to discriminate one sound from another.

这样看AC单纯从语法角度看就对了，是grammatically correct。这样的话就需要感受一下两个结构逻辑上的不同了：
discriminate的意思是区分，辨别，discriminate between是将两者放在一起加以区分，潜在意思是两个范围内的事物分别具有不同的特征可以来区分，而discriminate from则是从M中将N辨别出来，M 应该是genuine diamonds和imitation diamonds的集合，N 是genuine diamonds。

-- by 会员 jeffery2541 (2012/6/4 0:18:20)

恩恩，茅塞顿开~~！！谢谢！！