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【单选题】
乙类互补推挽功率放大电路在输出电压幅值约等于()时,管子的功耗最大。A.
0V
B.
最大时
C.
电源电压的一半
D.
0.6VCC
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反馈参考答案：
举一反三
【单选题】He grabbed me ______ and pulled me onto the bus. a. a. a arm b. an arm c. the arm d. by the arm
A.
a arm
B.
an arm
C.
the arm
D.
by the arm
【单选题】The boy led the old man ____ and hleped himget on the bus. A.by his arm B.by the arm C.with his arm D.with the arm
A.
by his arm
B.
by the arm
C.
with his arm
D.
with the arm
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