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【简答题】
请根据课堂讲授“笔下有财产万千、笔下有人命关天、笔下有是非曲直、笔下有誉毁忠奸”,结合实际典型案例分析,谈谈你对记者定位的认知。
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参考答案:
举一反三
【简答题】在图15.9.14(在教材中)的源极输出器中,已知U DD =12V,R S =12kΩ,R G1 =1MΩ,R G2 =500kΩ,R G =1MΩ。试求静态值、电压放大倍数、输入电阻和输出电阻。设V S ≈V G ,g m =0.9mA/V
【单选题】—— Alice looks sad. Did you tell her about the accident?    ——— Yes, but I ________ her just before her final exams.
A.
shouldn’t tell
B.
shouldn’t have told
C.
needn’t tell
D.
mustn’t have told
【简答题】2kV= V ,610mV= V,1mV= μV= V
【单选题】——Alice looks sad. Did you tell her about the accident? ——Yes, but I    ______ her just before her final examinations.
A.
should have told
B.
shouldn’t have told
C.
needn’t have told
D.
must have told
【简答题】在图15.41所示的源极输出器中,已知U DD =12V,R S =12kΩ,R G1 =1MΩ,R G2 =500kΩ,R G =1MΩ。试求:静态值、电压放大倍数、输入电阻和输出电阻。设V S ≈V G ,g m =0.9mA/V。
【单选题】--- Alice looks sad. Did you tell her about her brother’s accident? --- Sorry, I ________ her just before her final exams.
A.
can’t tell
B.
mustn’t have told
C.
needn’t tell
D.
shouldn’t have told
【判断题】电网的形状一般以“Y”字型为主。高度不低于1m,电压控制在1000V—10000V之间。
A.
正确
B.
错误
【单选题】交流电梯额定速度不超过1m/s时,渐进行安全钳动作速度V应()M/S。
A.
V≤1.5
B.
V>1.5
C.
1.5≤V<3
D.
1.5≤V<1
【单选题】24V的正极(+)连接到PLC输入( )端A. 1M B.COM
A.
1M
B.
COM
C.
IN
D.
OUT
【简答题】电路如下图a所示,已知V DD =15V,R G =1MΩ,R S =R L =2kΩ,场效应管I DSS =4mA,U GS(off) =-4V
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