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【多选题】
直接耦合放大电路存在零点漂移的原因是A.
电阻阻值有误差
B.
晶体管参数的分散性
C.
晶体管参数受温度影响
D.
电源电压不稳定
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皮皮学刷刷变学霸
举一反三
【单选题】The doctor advised Joyce strongly that she should take a holiday, but _______ didn't help.
A.
he
B.
She
C.
It
D.
which
【单选题】He came into the classroom _____. [ ]
A.
being upset
B.
very upset
C.
to upset
D.
to be upset
【单选题】He came into the classroom_________. [ ]
A.
very upset
B.
being upset
C.
to upset
D.
to be upset
【简答题】影响放大电路静态工作点的因素有电源电压的波动、管子的老化而发生变化,温度变化等,其中( )影响最大。
【单选题】What did the doctor suggest the woman should do?
A.
She should take some medicine and have a good rest at home.
B.
She should stay in hospital for a few days.
C.
She should come again in a day or two.
【单选题】__________is the simplest forging process
A.
Open-die forging
B.
Impression-Die Forging
C.
Closed-Die Forging
D.
Preicison Forging
【简答题】财务会计报告的使用者包括（ ）。
【简答题】影响放大电路静态工作点的因素有 波动、 因老化而发生的变化、 的变化等,其中 的影响最大.
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