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
E. the flights of the shuttle and earlier
spacecraft, whose shortness allowed them to
carry sufficient power in
fuel cells and batteries
Answer:
D
请问B选项的错误在哪里？谢谢！ | 
