皮皮学，免费搜题
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【单选题】
BJT三极管工作在放大状态的外部条件:( )A.
发射结正偏，集电结正偏
B.
发射结正偏，集电结反偏
C.
发射结反偏，集电结反偏
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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】I get up _ my mother does. [ ]
A.
can't, early than
B.
can't, so early as
C.
can, as earlier as
【简答题】A．红细胞输注 B．血小板输注 C．血浆置换输注 D．白蛋白输注 E．浓缩粒细胞输注 当失血较多，血容量不足时，可用 A． B． C． D． E．
【单选题】By the early 1760s, the____English colonies in North America were ready to separate themselves from Europe.
A.
12
B.
13
C.
14
D.
15
【判断题】By the early 1760s, the 13 colonies in North America were ready to seperate themselves from Great Britain.
A.
正确
B.
错误
【判断题】By the early 1760s, the 12 English colonies in North America were ready to separate themselves from Europe.
A.
正确
B.
错误
【简答题】红细胞输注(red blood ce11 transfusion)
相关题目：
【单选题】I get up _ my mother does. [ ]
A.
can't, early than
B.
can't, so early as
C.
can, as earlier as