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【简答题】
某晶体管工作在放大区，如果基极电流从10μA变化到20μA时，集电极电流从1mA变为1.99mA，则交流电流放大系数β约为 [填空(1)] 。 A. 99
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皮皮学刷刷变学霸
举一反三
【单选题】Part 2 task2 Conversation1, question3:
A.
The woman could probably repair it herself
B.
The mechanic's prices seem reasonable
C.
It probably won't cost her much repair
D.
American cars are cheaper to repair
【单选题】The task won't seem so ________ if you break it down into small steps.
A.
overwhelming
B.
anachronistic
C.
handy
D.
infamous
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