【单选题】【消耗次数：1】
下列检查内容中，不属于广播音响系统检测的是（）
①
A.最高输出电平
②
B.输出信噪比
③
C.阻抗匹配
④
D.响应时间
参考答案：
复制
纠错
随机题目
【单选题】
已知 <img class=jc-formula data-tex=f\left( x \right) =ln(\sqrt { x2+1 } +x) src=https://huaweicloudobs.ahjxjy.cn/3FE1900CD9B07D9086860790C332B0D1.png style=vertical-align: middle;/>，判断奇偶性。
①
奇函数
②
偶函数
③
非奇非偶函数
④
都是
【单选题】
Throughthewindowwecanseenothingbut_______buildings.
①
tallverymany
②
verymanytall
③
verytallmany
④
manyverytall
【单选题】
He was a good swimmer so he________swim to the river bank when the boat sank.
①
could
②
might
③
should
④
was able to
【单选题】
Few of them hurt themselves in the accident last night,_________？
①
dont they
②
didnt they
③
did they
④
do they
【单选题】
The joke told by Tom made us________,so the teacher couldnt make himself_______.
①
to laugh;hearing
②
laughing;heard
③
laughing;hear
④
laughed;heard
【单选题】
If it is fine tomorrow,we________a football match.
①
have
②
will have
③
has
④
shall has
【单选题】
To answer correctly is more important than________.
①
that you finish quickly
②
finishing quickly
③
to finish quickly
④
finish quickly
【单选题】
I haven’t finished my composition . I________ for two hours and a half.
①
have written it
②
have been writing it
③
wrote it
④
am writing it
【单选题】
The program was so exciting that the children kept their eyes________on the screen.
①
to fix
②
to be fixed
③
fixed
④
fixing