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【单选题】
当晶体三极管要工作在电流放大状态，外部条件应满足( )。A.
发射结反偏，集电结反偏
B.
发射结反偏，集结正偏
C.
发射结正偏，集电结反偏
D.
发射结正偏，集电结正偏
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举一反三
【单选题】______ fathers are both teachers.
A.
Ann's and Jane
B.
Ann's and Jane's
C.
Ann and Jane's
D.
Ann and Jane
【单选题】听力原文：W : What do you think of Jane's speech? M: Even though her speech was the last one on the program, it was the best one. Which of the following statements is true?
A.
Jane spoke last but not best.
B.
Jane spoke last and best.
C.
Even though last, Jane spoke fast.
【单选题】That tennis ball is one of ____. [ ]
A.
Jane father
B.
Jane's father
C.
Jane father
D.
Jane's father's
【简答题】Jane and I live in one room. Jane and I ______.
【单选题】That tennis ball is one of ___________.
A.
Jane fathers
B.
Jane’s fathers’
C.
Jane father’s
D.
Jane’s father’s
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