钢丝绳绕制方法分为（）。
A、同向捻、交互捻
B、交互捻、组合捻
C、同向捻、交互捻、组合捻
D、交互捻、组合捻、双向捻
参考答案：D
They became friends again that day. Until then they ______to each other for nearly two years.
A．didn’t speak
B．hadn’t spoken
C．haven’t spoken
D．haven’t been speaking
如果汇编语言程序中不使用关于微处理器选择的伪指令(如286、386…)，则下列哪一条指令无法通过汇编
A．SHL AX，CL
B．OUT DX，AL
C．IMUL BL
D．PUSH 1234H
