OG11th-103103. 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!! |