7. Since the 1930’s aircraft manufacturers have tried to build airplanes with frictionless wings, shaped so smoothly and perfectly that the air passing over them would not become turbulent.
(A) wings, shaped so smoothly and perfectly
(B) wings, wings so smooth and so perfectly shaped
(C) wings that are shaped so smooth and perfect
(D) wings, shaped in such a smooth and perfect manner
(E) wings, wings having been shaped smoothly and perfectly so
这道题选B,为什么不选C呢，
After more than four decades of research and development, a new type of jet engine is being tested that could eventually propel aircraft anywhere in the world within two hours or help boost cargoes into space at significantly lower costs than current methods permit.
A. tested that could eventually propel aircraft anywhere in the world within two hours or help
B. tested that could eventually have the capability of propelling aircraft anywhere in the world within two hours or to help
C. tested, eventually able to propel aircraft anywhere in the world within two hours, or helping
D. tested, and it eventually could propel aircraft anywhere in the world within two hours or helping
E. tested, and it could eventually have the capability to propel aircraft anywhere in the world within two hours or help
这道题前人给出答案选A呀，这两道题有点相似呀，如果7题选B，这道题是不是应选E呀（管给的答案是E
这两者有何联系？
下面一题的E错在：could eventually have the capability
(A) wings, shaped so smoothly and perfectly
为嘛不对啊？？
B) wings, wings so smooth and so perfectly shaped
wings,wings多余吧
7同意B
后面wings前面的同位语；that the air passing over them would not become turbulent 对 so smooth and so perfectly shaped的补充。
C中限定定从不恰当；
A中逗号后内的搭配和整体修饰对象有点儿问题。
7应该是B，
B中用wings使得同位语的同位（修饰）对象明确，否则有修饰wings or planes得嫌疑，因为没有明确的依据可以判定同位对象。同时也使得them得指带对象明确。从这点上看AC得错误是一样的。
后一道题应该选A吧，这两道题没有相似点，that修饰jet，句子重心在is being tested，而E中用and it和前面并列改变了句子重心，即使是这样，it也是没有必要的
同时could eventually have the capability to propel也错
根据句意，smooth是修饰wings,而perfectly 是修饰shaped.因此前一个用形容词性，后一个用副词。
| 欢迎光临 ChaseDream (https://forum.chasedream.com/) | Powered by Discuz! X3.3 |