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【简答题】
由555定时器构成的单稳态触发器如图10.3.14所示。图中，R 1 、C 1 组成什么电路?有何作用?在何种情况下可以省略该电路?
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【单选题】Why do installers tend to work with large companies?
A.
Because it is more economically efficient.
B.
Because smaller companies are in the dark.
C.
Because large companies offer better prices.
D.
Because the government offers attractive incentives.
【简答题】zhuāng这个音节的声母是();韵母是(),属于四呼中的()韵母,可以和ang、()、üang形成押韵。声调是()声调,调值是()。
【简答题】Do you think movement of staff between companies is likely to increase in the future? (Why? / Why not?)
【简答题】Do you think it is important for companies to be involved in educational projects? (Why? / Why not?)
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