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【单选题】
谐振功率放大器输入激励为余弦波,放大器工作在过压状态时,集电极电流为( )A.
余弦波
B.
尖顶余弦脉冲波
C.
有凹陷余弦脉冲波
D.
三角波
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【单选题】I hope to go to Mexico. I love the place the people are really friendly and warm. [ ]
A.
when
B.
what
C.
which
D.
where
【简答题】幸福;康乐;安康 n. __
【简答题】舒适,健康,幸福,n.
【单选题】It is ________ the pupils do in their spare time ________ really prepares them to take their place in society as citizens when they grow up.
A.
which; that
B.
that; what
C.
what; that
D.
that; which
【单选题】— I'll go to Beidaihe for my holiday this summer. — It's really a beautiful place. I _______ there twice. [ ]
A.
am going
B.
will go
C.
have been
D.
have gone
【单选题】— Mom, I got _______ place in the English Speech Competition? — _______! That's really good news, dear!
A.
the first; Congratulation
B.
first; I'm sorry to hear that
C.
the first; Congratulations
D.
first; What a pity
【简答题】n. 舒适，健康，幸福A. well-being
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