T-4-Q30求解

ljwan

207.(T-4-Q30)Unlike the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries, a permanently orbiting space station will have to generate its own electricity.

A.the short flights of the shuttle and earlier spacecraft, which carried sufficient power in fuel cells and batteries,

B.the shuttle and earlier spacecraft, with sufficient enough power in fuel cells and batteries for their short flights,

C.the short flights of the shuttle and earlier spacecraft, which enabled them to carry sufficient enough power in fuel cells and batteries,

D.the shuttle and earlier spacecraft, which were capable of carrying sufficient power in fuel cells and batteries for their short flights,(D)

E.the flights of the shuttle and earlier spacecraft, whose shortness allowed them to carry sufficient power in fuel cells and batteries,

请教NN，能不能帮忙详细解释一下各选项的错误

eshopaholic

首先，为了对应space station, 排除A，C，E选项

其次，B中sufficient 和 enough 重复

ljwan

为什么short flight 和space station不平行，而earlier spacecraft 就对呢？

eshopaholic

"短距离飞行“  ”空间站“   不是同一类东西