CPU中（）用于存放下一条将要执行的指令地址。
A.程序计数器
B.累加寄存器
C.地址寄存器
D.指令寄存器
参考答案：A
—How do you find the new book by J．K.Rowling?
—________.I guess she is out of her talent.
A．With the help of my mother
B．By accident
C．Very boring
D．In the library
写出两条发源于青藏高原的河流______、______．
