单项选择题

The purpose of this passage is_____.

A．to explain why people fail to act in emergencies
B．to explain when people will act in emergencies
C．to explain what people will do in emergencies
D．to explain how people feel in emergencies

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单项选择题

The author suggests that_____.

A．we shouldn't blame a person if he fails to act in emergencies
B．a person must feel guilty if he fails to help
C．people should be responsible for themselves in emergencies
D．when you are in trouble, people will help you anyway

单项选择题

What is the main idea of the forth paragraph

A．Impact of robots.
B．Relationship between robots and jobs.
C．Robotic manipulators.
D．Damages of robots.