单项选择题

What is the main idea of the passage

A．Work plays an important part in our general lifestyle.
B．People are divided into social classes according to how much they earn each month.
C．It is very possible that game will replace work as the most important part in our life.
D．Game players know how to get the most fun and enjoyment out of our leisure time.
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单项选择题
The main idea of this passage is that ______.
A．modern scientists divide the process of dying into clinical and biological death
B．biological death occurs when vital organs have suffered permanent damage
C．scientists have found a way to prolong the period of clinical death
D．cooling delays the processes leading to biological death
单项选择题
One possible benefit of the experiment discussed in the passage is ______.
A．less crowded cities
B．victory over death
C．protection against fatal injury
D．fewer deaths from heart attacks
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