放大电路经常采用分压式偏置电路,主要目的是为了稳定静态工作点。
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Translation the sentence:His father was a fisherman, he was as poor as we are .
Translating the sentence:A red sun rose slowly from the calm sea.
Translating the sentence:The blond boy quickly crossed himself.
1.豌豆的卷须是什么部位变态而来( )
A. 叶柄
B. 小叶
C. 托叶
D. 叶尖
E. 叶缘