1g碳水化合物体内彻底燃烧产生的能量为（）。
A.23.6kJ
B.16.7kJ
C.29.3kJ
D.36.7kJ
E.28.5kJ
参考答案：B
7. There is no ___________ in trying to talk him into joining us. He enjoys being alone.
A．doubt
B．wonder
C．hope
D．Point
通常初始化拷贝构造函数的参数是
A．某个对象名
B．某个对象的成员名
C．某个对象的引用名
D．某个对象的指针名
___________ in trying to talk him into joining us. He enjoys being alone.