标题: OG SC103 jumbo rocket [打印本页] 作者: perain 时间: 2011-4-20 13:54 标题: OG SC103 jumbo rocket 103. The development of a new jumbo rocket that is expected to carry the United States into its next phase of space exploration will be able to deliver a heavier load of instruments into orbit than the space shuttle and at a lower cost. (A) The development of a new jumbo rocket that is expected to carry the United States into its next phase of space exploration will be able to deliver a heavier load of instruments into orbit than the space shuttle and at a lower cost. (B) The development of a new jumbo rocket is expected to carry the United States into its next phase of space exploration and be able to deliver a heavier load of instruments into orbit at a lower cost than the space shuttle. (C) The new development of a jumbo rocket, which is expected to carry the United States into its next phase of space exploration, will be able to deliver a heavier load of instruments into orbit at a lower cost than the space shuttle. (D) A newly developed jumbo rocket, which is expected to carry the United States into its next phase of space exploration, will be able to deliver a heavier load of instruments into orbit than the space shuttle can, and at a lower cost. (E) A newly developed jumbo rocket, which is expected to carry the United States into its next phase of space exploration, will be able to deliver a heavier load of instruments into orbit than the space shuttle and to cost less.
答案是D, 书上的解释说E "Verb can is needed after space shuttle to create a correct comparison; to cost less is confusing because it seems to parallel to deliver" 如果不考虑前面有没有can 的问题，will be able to deliver 。。。and to cost less这个结构是正确的么？求正解~！作者: 2simple 时间: 2012-2-14 11:08
网上搜到这个解释非常好： http://gmatclub.com/forum/the-development-of-a-new-jumbo-rocket-that-is-expected-to-85062.html