单项选择题
A．飞机在没有空气的太空里不能飞行。 B．太空里没有空气，飞机在那不能飞行。 C．一架飞机在没有空气的太空里不能飞行。 D．一架飞机在没有空气的外部太空里不可能飞行。
This passage might be taken from（） A．a textbook B．a sci...
单项选择题This passage might be taken from（）
A．a textbook B．a science fiction article C．a popular magazine D．a manufacturer's report
Which of the following is not mentioned as a factor in ...
单项选择题Which of the following is not mentioned as a factor in accidents in this passage（）
A．Mood. B．Tiredness. C．Carelessness. D．Weather.
Which do you think would be the best title for the pass...
单项选择题Which do you think would be the best title for the passage（）
A．Accidents and Anxiety B．How Accidents Are Caused C．Human Factors in Accidents D．How to Prevent Accidents on Roads and in Factories
