输油管道安装之前要检查管道外观（包括工厂做的保温层）的质量。
参考答案：对
—He is in his late 40s now and still single.
—It is high time he _____ himself a wife and settled down.[ ]
A. has to get
B. will get
C. gets
D. got
下列存储器件中，存取速度最快的是（）。
A．主存
B．辅存
C．寄存器
D．高速缓存
