[原创]黄皮语法OG11-103 - ChaseDream

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.

D. A newly develped 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 shutttle can,and at a lower cost.

E. A newly edveloped 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 shutttle and to cost less.

我不懂and at a lower cost中的and连接前面哪一部分，做什么句子成分。

E答案如果加上can的话我认为也对，是不是？而且我觉得to cost less可以和to deliver并列，但答案说不可以。为什么?

以下是引用shanshan0511在2008-11-8 20:48:00的发言：

OG11-103题

答案是D

我不懂and at a lower cost中的and连接前面哪一部分，做什么句子成分。

E答案如果加上can的话我认为也对，是不是？而且我觉得to cost less可以和to deliver并列，但答案说不可以。为什么?

答案是

以下是引用connie4895在2008-11-8 23:12:00的发言：

will be able to deliver...., and (will be) at a lower cost.

will be able to deliver a heavier load of instruments into orbit than the space shuttle can, and (deliver a heavier load of instruments into orbit )at a lower cost(than the space shuttle can)