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问题 判断题

对于全部或者部分使用国有资金投资或者国家融资的项目，必须进行招标。（）

答案

参考答案：对

问答题

Only about (31) ____________of people over 65 become senile.A much more common problem is in fact caused by: (32) ____________.(33) ____________.Nearly (34) ____________of people over 65 has at least one serious illness. Maybe about 15% of older people suffer from (35) ____________.When people become old, there are changes in metabolism, lungs, the senses, (36) ____________and (37) ____________.
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选择题

在一化学反应中，其产物的总能量为500kJ，如果该反应是吸热反应，那么反应物的总能量可能是( )

A．450kJ

B．650kJ

C．800kJ

D．520kJ
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