题目内容

仿真程序中有哪些模块( )

A. 控制器仿真
B. 传感器信号仿真
C. 加热炉运行仿真
D. 定时器

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变量分为内部变量和() 是PLC定义的存储单元的映像,其值随PLC的程序执行而改变,如启停、急停、复位、手动自动切换等

It is very strange that whenever Brian does anything unexpected, his wife can always ascribe his behaviorthe external environment and sometimes to destiny.

A. to
B. at
C. under
D. in

Until its eventual collapsethe weight of accumulated economic pressures, the system operated successfully for almost over 20 years.

A. out
B. in
C. over
D. under

Feelings, emotions, and desires must subordinate themselves reason because they sometimes could be irrational and biased.

A. at
B. to
C. in
D. over