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【简答题】
在下图所示差分放大电路中，已知U CC =12V，-U EE =-12V，R C1 =R C2 =10kΩ，R w =1kΩ，R B1 =R B2 =2kΩ，R E =10kΩ，三极管U BE =0.6V，β 1 =β 2 =60。试求：
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【单选题】How does Luis say hello to Chris?
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Hi, Chris. What's up?
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8 o’ clock.
B.
10 o’ clock.
C.
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【简答题】Questions 26 to 30 are based on the following passage. To understand the marketing concept, it is only necessary to understand the difference between marketing and selling. Not too many years ago, mos...
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