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【简答题】
PLC的开关量输出接口方式有( )、( )、( )。
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皮皮学刷刷变学霸
举一反三
【简答题】Many a student _____ the importance of learning a foreign language. [ ] a. have realized b. has realized c. have been realized d. has been realized
【单选题】Many a teacher and many a student ( ) going to watch a football match.
A.
is
B.
are
C.
were
D.
be
【多选题】砖墙上不得留脚手眼的部位包括( )。
A.
空斗墙、半砖墙和砖柱
B.
宽度小于1m的窗间墙
C.
距洞口240 mm处
D.
梁或梁垫下及其左右各500 mm范围内
E.
距转角300 mm处
【单选题】Many a student that mistake before.
A.
had made
B.
has been made
C.
have made
D.
has made
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