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【单选题】
共发射极放大电路中,集电极电阻的作用是: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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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】有关体温生理性变化的正确描述是()
A.
一昼夜中体温以2:00-8:00时最低，14:0018:00时最高
B.
儿童体温略低于成人
C.
麻醉药物能影响体温调节中枢，使体温升高
D.
女性月经前期、妊娠早期体温略高，而排卵期体温略降低
E.
进食运动后体温无变化
【单选题】Scarlett Johnasson developed ______ interest in acting at three and has made herself perhaps ______ finest actress of her generation.
A.
an; a
B.
/; the
C.
an; the
D.
/; a
【简答题】Why did Silas take away some of the memories of Scarlett and her mother?
【单选题】Scarlett _________ Butler in 1998. They _________ for ten years.
A.
married, have got married
B.
married with, have got married
C.
got married to, have been married
D.
married, married
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