问题
单项选择题
设备声级检测测量相邻测点声压级差值应不大于（），否则需要增加测点。
A.3dB（A）
B.4dB（A）
C.5dB（A）
D.6dB（A）
答案
参考答案：A
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设备声级检测测量相邻测点声压级差值应不大于（），否则需要增加测点。
A.3dB（A）
B.4dB（A）
C.5dB（A）
D.6dB（A）
参考答案：A
| 补全句子，从方框中选出合适的答案完成句子。 | |
 A man was killed yesterday morning. A policeman wants to know: "What were you doing at ten o'clock yesterday morning? If you are a doctor, you may say: I was 1______ If you are a driver, you may say: I was 2______ If you are a teacher, you may say: I was 3______ If you are a businessman, you may say: I was 4______ If you are a student,you may say: I was 5______ If you are a football player, you may say: I was 6 ______ If you are a street seller, you may say: I was 7______ If you are visitor, you may say: I was 8______
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