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【单选题】
已知共射基本放大电路,Vcc=12V,Rc=RL=3kΩ,UCES=0.5V,正常情况下U CEQ =6V,集电极电阻RC的作用是(  )。
A.
放大电流
B.
调节IBQ
C.
调节ICQ
D.
防止交流信号对地短路,并把放大了的电流信号转换为电压信号
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参考答案:
举一反三
【单选题】Coreldraw的源文件扩展名是( )
A.
JPG
B.
PSD
C.
TIFF
D.
CDR
【单选题】Recently an advertising company called 200 people and asked them to identify the company that was in an ad running nationwide. The following results were obtained. What percentage of those female surv...
A.
52.38
B.
40.00
C.
22.00
D.
42.00
【多选题】单位可以不单独设立会计机构,下列关于该情况的说法中,正确的有( ).
A.
不设置会计机构的,应设置会计人员并指定会计主管人员
B.
规模很小、经济业务简单、业务量相对较少的单位,为了提高经济效益,可以不单独设置会计机构,也不用设置任何会计人员
C.
实行企业化管理的集团公司均不设立会计机构
D.
指定会计主管人员的目的是强化责任制度,防止出现会计工作无人管理的局面
【单选题】Recently an advertising company called 200 people and asked them to identify the company that was in an ad running nationwide. The following results were obtained What percentage of those surveyed cou...
A.
42.00
B.
43.10
C.
55.00
D.
56.89
【多选题】单位可以不单独设立会计机构,下列关于该情况的说法中,正确的有( )。
A.
不设置会计机构的,应设置会计人员并指定会计主管人员
B.
规模很小.经济业务简单.业务量相对较少的单位,为了提高经济效益,可以不单独设置会计机构,也不用设置任何的会计人员
C.
实行企业化管理集团公司均不设立会计机构
D.
指定会计主管人员的目的是强化责任制度,防止出现会计工作无人管理局面
【单选题】( )不属于衡量企业物流质量的主要因素。
A.
物流时间
B.
物流成本
C.
物流效率
D.
物流网络
【简答题】低合金结构钢的0.9mm直径或厚度17~25mm的钢的机械性能分别为屈服点__,抗拉强度__,伸长率__。
【单选题】Can the following code be compiled successfully ? What results can be obtained when is is running ? (If the code passes the compilation)
A.
Compiled successfully but throws some Exception when it is running.
B.
Failure of compilation.
C.
It is all right but no output result.
D.
It is all right and the output result is ZERO.
【单选题】Recently an advertising company called 200 people and asked them to identify the company that was in an ad running nationwide. The following results were obtained What percentage of those surveyed wer...
A.
22.0
B.
40.0
C.
52.4
D.
66.7
【单选题】型号为LGJQ 的导线是()型导线。
A.
B.
单相
C.
三相
D.
多相
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