当线路的转角角度（偏转角）在30度——60度时，拉线程式比（）。
A.电缆吊线相同
B.比电缆吊线加强一级
参考答案：B
Since RAM is only active when the computer is on, your computer uses disk to store information even when the computer is off. Which of the following is true （ ）
A．When your computer is on, only RAM is used to store information.
B．When your computer is on, only disk drives are used to store information.
C．When your computer is off, only RAM is used to store information.
D．When your computer is off, only disk drives are used to store information.
我国铁路集二线的终点站是( )车站。
A．满洲里
B．二连站
C．阿拉山口站
D．丹东站
