PLC（）阶段根据读入的输入信号状态，解读用户程序逻辑，按用户逻辑得到正确的输出
A.输出采样
B.输入采样
C.程序执行
D.输出刷新
参考答案：C
The wise use that is ____ the limited time has greatly contributed to his success.
A．made of
B．to make of
C．making for
D．made for
GF70型罐车各管路腐蚀大于（）时截换或更换
A.20%
B.30%
C.40%
D.50%
