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【判断题】
设计 PLC 系统时 I/O 点数不需要留裕量,刚好满足控制要求是系统设计的原则之一A.
正确
B.
错误
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举一反三
【简答题】What is the meaning that I really don ’ t know what to say at this moment?
【单选题】—That must be a mistake. —No, it _____ a mistake.
A.
must not be
B.
needn’t be
C.
cannot be
D.
would not be
【单选题】--The mistake_____, I had been more careful. ---But you weren’t at that time.
A.
might have avoided
B.
would avoid
C.
would be avoided
D.
might have been avoided
【单选题】I ’ ll start the work _______he comes. I don ’ t know what to do first.
A.
after
B.
before
【简答题】When you make a mistake, big or small, cherish (珍视) it like it’s the most precious thing in the world, because in some ways, it is. Most of us feel bad when we make mistakes, beat ourselves up about i...
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