PREP07-2第60题~求助~

小唯唯

Pioneeredbyscientists at Los Alamos National Laboratory, BEAM roborts are not programmed to walk; instead they use brainlike circuts called neural networks to learn to walk through trial and error.

A. BEAM robots are not programmed to walk; instead they use brainlike circuits called neural networks to learn to walk through trial and error
B. BEAM robots learn to walk through trial and errorby using brainlike circuits called neural networks instead of by programming them
C. BEAM robots are not being programmed to walk but instead using brainlike circuits called neural networks and learning to walk through trial and error
D. brainlike circuits called neural networks are used instead of programming for BEAM robots learning to walk through trial and error
E. brainlike circuits called neural networks are being used for BEAM robots that learn to walk through trial and error instead of being programmed

在PREP笔记中解释C是说using和are not being并列了，但是为什么不能并列呢？？是因为using主动语态么？但是正确答案Ａ中也是用的they use呀~
P.S. 这道题我搜索了坛子的，但是只有一个指向，而且他问的问题和我不同，而且，是个2010年得帖子……可能不会有人回，我就开了个新帖哈

小唯唯

顶起~~求助

cocoloop

主要是时态不对，为什么用被动语态的进行时呢？其次，没有体现出前后对比的逻辑关系：not
programmed to walk ，but use....to learn to walk

小唯唯

主要是时态不对，为什么用被动语态的进行时呢？其次，没有体现出前后对比的逻辑关系：not
programmed to walk ，but use....to learn to walk

-- by 会员 cocoloop (2011/3/26 18:23:08)

恩……时态……那也就是PREP笔记上的解释也不尽然对了？？  你后面半句的意思是说C没有用learn to walk 而用的and learning没有表达出逻辑含义么？

cocoloop

是的...还没来得及拜读prep语法笔记啊,但我觉得可以并列，只是使用三个进行时态的并列分句很别扭，are not being ....but using brainlike circuits and learning...

小唯唯

是的...还没来得及拜读prep语法笔记啊,但我觉得可以并列，只是使用三个进行时态的并列分句很别扭，are not being ....but using brainlike circuits and learning...

-- by 会员 cocoloop (2011/3/26 23:24:31)

哈恩……谢谢啦