The best statement of the main idea of this passage is that

A． scientists have found a way to prolong the period of clinical death

B． biological death occurs when vital organs have suffered permanent damage

C． modern scientists divide the process of dying into clinical and biological death

D． cooling delays the processes leading to biological death

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参考答案

【答案】A。解析：A项“科学家已找到延长临床死亡的办法”最能够体现全文主旨。

1 One characteristic of clinical death is

A． lasting damage to the lungs

B． destruction of the tissues

C． temporary non-functioning of the heart

D． that the organism cannot be revived

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2 According to the passage, cooling an organism

A． speeds up the body's metabolism

B． slows disintegration of body tissues

C． prevents damage to organs

D． revives damaged organs

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3 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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