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搜题
【单选题】
( )为中华民族大家庭的团结和睦和兴旺发达提供了坚强的思想纽带。
A.
中华民族大复兴
B.
中国悠久的历史
C.
社会主义的光辉前景
D.
社会主义核心价值体系的理论指导
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【单选题】功率放大电路的主要参数有( )和最大输出功率
A.
静态工作点
B.
电压
C.
电流
D.
效率
【简答题】电路及主要参数如下图,若要求负载RL上获得Pomax=10W的最大功率,应用选择管耗为多大、最大集电极电流为多大的功放管?
【判断题】功率放大电路的主要参数是最大输出功率Pom,和效率η。
A.
正确
B.
错误
【单选题】You can take___ of the two toy cars and leave the other for your brother.
A.
one
B.
none
C.
our
D.
either
【单选题】From the development history of the toy we can know that ______.
A.
it was the first product that appeared in an advertisement on TV
B.
it was entirely made of plastic in 1960
C.
many forms of it have been designed before 1982
D.
it is not one kind of toy any more at last
【单选题】— Can I have a toy car, please? — ________.
A.
I can
B.
OK
C.
You can
【单选题】You can turn on the toy robot by__________ this button.
A.
pressing
B.
press
C.
pressed
【单选题】You can take ________ of the two toy cars and leave the other for your brother. (14,安徽)
A.
both
B.
none
C.
either
D.
neither
【单选题】You can take_______ of the two toy cars and leave the other for your brother.
A.
both
B.
none
C.
either
D.
neither
【多选题】功率放大电路的主要参数( )。
A.
效率
B.
输出功率
C.
输入电阻
D.
管耗
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