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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.

正确答案: D

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[求助]OG11th 103,烦恼!!

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楼主
发表于 2009-7-20 11:58:00 | 只看该作者

[求助]OG11th 103,烦恼!!

OG11th-103

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。答案怎么选出来的我已经知道了,只是对D向中的“逗号+and at a lower cost”还十分不解。

1.  at a lower cost到底在句中作的什么成分啊?

2.从句意上来看,at lower cost 和a heavier load平行,可是前者是介宾短语,后者是名词,两者可以平行吗?

3.即使两者可以平行,前面的逗号+and是怎么回事啊,按理不应该有逗号啊。

请NN们救急啊!!

沙发
 楼主| 发表于 2009-7-20 12:18:00 | 只看该作者

为什么我的帖子总是没人会就沉下去呢??大家帮帮忙啊

板凳
发表于 2009-11-3 08:28:33 | 只看该作者
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