问答题

______(不是在一段时间内只力图拯救一个物种), they are trying to save a complete natural environment.

【参考答案】

Instead of attempting to save one species at a time

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单项选择题

Which of the following is NOT true according to the passage

A．Unhappiness may cause disease.
B．Drinking alcohol may cause damage to the immune system.
C．Too much sorrow is harmful to the immune system.
D．Psychological stress leads naturally to the damage of the immune system.

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