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【判断题】
The voltage gain of the amplifier is the amplitude of the output voltage minus the amplitude of the input voltage.A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】When I saw my teacher nodding _______ to me, I calmed down and went on with my performance.
A.
encouragingly
B.
amazingly
C.
increasingly
D.
accordingly
【单选题】When I saw mum nod _______ to me, I calmed down and went on with my acting.
A.
encouragingly
B.
amazingly
C.
increasingly
D.
accordingly
【单选题】下列关于算法的说法不正确的是（ ）
A.
算法必须在有限步操作之后停止．
B.
求解某一类问题的算法是唯一的．
C.
算法的每一步必须是明确的．
D.
算法执行后一定产生确定的结果．
【简答题】请说出观察宫缩的方法。
【单选题】The price ________, but I doubt wheth er it will remain so. [ ]
A.
went down
B.
will go down
C.
has gone down
D.
was going down
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