【单选题】【消耗次数：1】
She _________ the children not to make any noise.
①
tell
②
told
③
said
④
telling
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相关题目
【单选题】
She will have to find somewhere else to work, for she
can’t ____this loud noise any longer.
①
come up with
②
catch up with
③
keep up with
④
put up with
【单选题】
The airplane?[填空] is taking off?is?making a lot of noise.
①
what
②
which
③
who
④
those
【单选题】
There is a real possibility that these animals could be frightened, ______ a sudden loud noise.
①
being there
②
should there be
③
there was
④
there have been
【单选题】
Now we may be able to say ____ between music and noise.
①
that what the difference
②
what the difference is
③
the difference is what
④
what is the difference
【单选题】
There was so much noise in the classroom that the teacher couldn’t make himself _______.
①
heard
②
hearing
③
to hear
④
hear
【单选题】
They will inform him ____ any progress they make in the experiment.
①
about
②
on
③
of
④
with
【单选题】
She resorted to ____ when she had no money to buy foods for her children.
①
have stolen
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steal
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stole
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随机题目
【单选题】
在放大电压信号时，通常希望放大电路的输入电阻和输出电阻分别为（）。
①
输入电阻小，输出电阻大
②
输入电阻小，输出电阻小。
③
输入电阻大，输出电阻小。
④
输入电阻大，输出电阻大。
【单选题】
在阻容耦合放大电路中，耦合电容的作用是（）。
①
将输入的交流信号耦合到晶体管的输入端
②
将输入的交流信号耦合到晶体管的输入端，同时防止偏置电流被信号源旁路
③
将输入的交流信号加到晶体管的基极
④
没什么作用
【单选题】
用一个截止频率为w1的低通滤波器和一个截止频率为w２的高通滤波器，构成一个带通滤波器，应当使（）。
①
二者串联，并且w1w２
②
二者并联，并且w1w２
③
二者并联，w1w２
④
二者串联，w1w２