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单项选择题
A．Science benefits us but costs much.B．Science harms us but brings about no benefits.C．Science benefits and harms as well if out of control.D．Science can help make Better swords.
A．Science benefits us but costs much.
B．Science harms us but brings about no benefits.
C．Science benefits and harms as well if out of control.
D．Science can help make Better swords.
单项选择题
A．For the sake of their health.B．For the maintenance of the heating or the air-condition.C．To make best use of their resources.D．To make full use of the heating or the air-condition.
A．For the sake of their health.
B．For the maintenance of the heating or the air-condition.
C．To make best use of their resources.
D．To make full use of the heating or the air-condition.
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