题目内容

After the presentations we should allow time for a ____, in case the clients have any questions.

查看答案

搜索结果不匹配？点我反馈

更多问题

I think that would really ____ the boss.

OK, don’t forget to make some ____copies to give to the new clients and anyone else who forgets to bring theirs.

声音的频率范围是 ()。

A. 大于20赫兹小于20000赫兹
B. 小于200赫兹或大于20000赫兹
C. 小于200赫兹或大于2000赫兹
D. 大于20赫兹小于2000赫兹

分贝是表征()的量度单位。

A. 声功率级
B. 声强级
C. 声压级
D. 以上都可以