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试用相位平衡条件判断图3所示石英晶体振荡器能否产生振荡，如能振荡说明它属于什么类型，电路中的石英晶体起什么作用。
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【简答题】A co-worker is playing music through his computer speakers loud enough to heardown the hall. What should you do?A. Start singing along. If you can’t beat them, join them. B. Put on your headphones and...
【单选题】A co-worker is playing music through his computer speakers loud enough to hear down the hall. What should you do?
A.
Start singing along. If you can’t beat them, join them.
B.
Put on your headphones and sulk.
C.
Turn up the music on your own computer. Two can play at that game.
D.
Nicely walk over and say that while you are a huge fan of Bachman-Turner Overdrive, you are having trouble concentrating. Ask politely if he wouldn't mind listening through headphones
【简答题】根据对话内容，将方框内符合对话情景句子的序号，抄写在对话的空白处，使对话恢复完整。每句只能用一次。注意：选项中有两项是多余的。 A: We are going to play basketball. 小题1: B: Yes, but I can’t go now. A: Why? What do you have to do? B: 小题2: A: 小题3: B: He has a sore th...
【简答题】C Monday: Here I am, in the middle of nowhere. This camping trip idea is not getting off to a very good start. It’s raining and the tent leaks (漏). The hiking seemed to take forever, and I still can’t...
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