单项选择题

The crew died as a direct result of ______.

A．the smash of the cabin on impact on water
B．the explosion of the spacecraft into a fireball
C．the disintegration of the spacecraft
D．the breakdown of the booster

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热门试题

单项选择题

Which of the following is mentioned as an improvement on the launch of Discovery

A．a special examination of the O ring
B．greater safety design of the crew cabin
C．redesign of the booster system
D．careful consideration of the effects of weather

单项选择题

The word overrule in the first sentence of paragraph 2 means ______.

A．share
B．ignore
C．consider
D．know