下列各步变化:A[HCl]→B[Cl2]→C[Ca(ClO)2]→D[HClO]→E[CO2],其中不能直接实现的是
A.A→B
B.B→C
C.C→D
D.D→E
答案:D
用恰当的关系代词填空。
1. The man _________ came to our classroom yesterday wanted me to lend him the book ________
I borrowed from the library.
2. The girl, _________ hair is very long, sings very well.
3. The boy _________ we saw this morning is from Shenzhen. He has a model plane ________ can fly
very high.
______是一种特殊的成员函数,它主要用来为对象分配内存空间,对类的数据成员进行初始化并执行对象的其他内部管理操作。