选择题：Alice,together with two boys,for having broken the

题目内容：

Alice,together with two boys,
for having broken the rule.
A. was punished
B.punished
C.were punished
D.being punished

参考答案：

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[填空题,11.1分] 电源电压为+12V的555定时器、组成施密特触发器，控制端开路，则该触发器的回差电压△VT为（）。

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