Why was the hydraulic fuel pump seal important for the space shuttle? How many flights will Voss have finished if his four-mont

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问题 Why was the hydraulic fuel pump seal important for the space shuttle?
How many flights will Voss have finished if his four-month mission starting in July 2000 ends up success-fully?

选项 A、Three.
B、Two.
C、Four.
D、Five.

答案C

解析 第三段第四句"The 50-year-old Army officer,who lives in Houston,is now in training for a four month mission as a crew member on the International Space Station starting in July 2000".提到在执行2007年7月飞行任务以前,他已经成功完成了3次飞行任务。
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