四六级考试

试题来源：大学四级-231
【单选题】 Why was the hydraulic fuel pump seal important for the space shuttle
A．Because previous seals all failed.
B．Because it was very complex in running the space program.
C．Because cracks in the seals could be disastrous.
D．Because great care has to be taken of the hydraulic fuel pump sealing.

参考答案：C
网考网解析：
本题的提问点在第一段末尾处，“because any crack in the seals could have led to destructive... 查看试题解析出处>>