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【单选题】
用仿真软件分析放大器输出电阻,最可行的方法是A.
对输出信号作频域分析
B.
用虚拟万用表电阻档位，直接在输出端测量输出电阻
C.
改变负载，分析电压变化量与电流变化量的比值
D.
作扫频分析，找3dB带宽与中心频率
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举一反三
【简答题】 Counter-offers are _______________ to the original offer. Once a counter-offer is made, the original offer shall be automatically ________________ .
【判断题】Once a counter-offer is made by the offeree, the original offer made by the offeror loses its effectiveness.
A.
正确
B.
错误
【简答题】定义函数rect_perimeter,完成计算长方形周长功能。
【多选题】Which Two of the following statements describe the rules on acceptance of an offer?
A.
Once an offer has been accepted a contract comes into existence
B.
Acceptance can be inferred from the conduct of the parties
C.
Acceptance only takes place once it has been communicated to the offeror
D.
A counter-offer may constitute acceptance
【简答题】戴近视眼镜的人,眼睛看起来会比实际的小;戴远视眼镜的人,眼睛看起来会比实际的大。
【判断题】Once the counter-offer is made, the original offer is no longer valid, and the offeree now becomes the offeror as the counter-offer becomes the new offer.
A.
正确
B.
错误
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