题目是: The National Transportation Safety Board has recommended the use of fail-safe mechanisms on airliner cargo door latches assuring the doors are properly closed before takeoff and to prevent them from popping open in flight. A. assuring the doors are properly closed B. for the assurance of proper closing C. assuring proper closure D. to assure closing the doors properly E. to assure that the doors are properly closed 答案选E 想问一下, 如果是E选项,那么and 前后连接的一个是assure that...的从句, 一个是动词短语, 不是违反对称原则么?? 还有一题.... In the recent years cattle breeders have increasingly used crossbreeding, in part that their steers should acquire certain characteristics and partly because crossbreeding is said to provide hybrid vigor. 答案是 partly to aquire certain chatacteristics in their steers 请问: partly... and partly...是对称了,但partly to do...and partly because...应该不对称吧??是不需要考虑partly后面的么? -- by 会员 wyywing (2011/7/18 23:59:20)
平行不是全都要对应相等的啊，是具体问题具体分析，比如说OG上有一题，具体哪个忘了，前面是现在式，后面是过去式。第一供热用TO应该是表目的吧，第二个because是表原因。小生欢迎各位踊跃拍砖。 | 
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发表于 2011-7-18 23:59:20
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