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【单选题】
在WinCC中,组态启动按钮的按事件,当释放按钮时变量值为假,采用“直接连接”方式,则来源项的常数值应为( )。A.
1
B.
0
C.
1或0
D.
以上都不对
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举一反三
【简答题】结构在规定条件下和规定时间内,完成规定功能的概率称为()。
【单选题】We post up a set of rules for the house. What is the meaning of ‘a set of’in the sentence?
A.
a number of things that belong together
B.
one of the groups of games
C.
the set for a play, film, or television show
D.
the way that it is fixed in a particular expression or position
【简答题】Kate’s room is big. A TV set (电视机)is in the room. The TV set is on the table. Some red flowers (花) are on it, too. We can see a nice picture on the wall（墙）. We can see a hat and some books on her bed....
【简答题】结构在规定条件下和规定时间内完成预定功能的概率称为结构的( )。
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