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问题 单项选择题

一级会议类扩声系统声学特性指标是( )。

A．额定通带内大于或等于90dB
B．额定通带内大于或等于94dB
C．额定通带内大于或等于98dB
D．额定通带内大于或等于102dB

答案

参考答案：C

解析： GB50371—2006《厅堂扩声系统设计规范》表4.2.3或《复习指导书(供配电)》15.7.3.3表15-7-3。

填空题

根据句意及首字母、汉语和音标提示在下面的空格中填上一个意思恰当的词。

1. China, with an area of 9.6 million square kilometers, is a______ seventeen times the size of France.

2. It's a pity that you [mist] ______ the chance to study abroad.

3. Oct. l1 is our ______ Day and we always hold celebrations of all kinds on the day.

4. The old man told us his e______ in the Long Match.

5. To work hard is the only way to win [ri'sptke] ______ from one's workmates.

6. Mr. Li, i_______ his students, is going to visit the Great Wall tomorrow.

7. The task is a bit _______ (富有挑战性的) because it calls for a good master of English.

8. They have decided to [step] _______ up the production to meet the increased demand.

9. She greeted her friend e_______ and kissed her.

10. Some 200 students attended the opening _______ (仪式).

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多项选择题

承建单位必须严格按以下那几个指南进行施工？（）

A、室内覆盖施工作业指南

B、直放站施工作业指南

C、监理工作指南

D、验收撞指南
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