问题
单项选择题
某工厂，距机器噪声源10m处测得噪声值为92dB，则距机器噪声源25m处的噪声值为（）dB。
A.80.5
B.82.04
C.83.96
D.84.04
答案
参考答案：D
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某工厂，距机器噪声源10m处测得噪声值为92dB，则距机器噪声源25m处的噪声值为（）dB。
A.80.5
B.82.04
C.83.96
D.84.04
参考答案：D
Passage 1
What kind of exhibits might have been collected in Liverpool Maritime Museum a. Those related with sea lives, for example sea lions. b. Those related with the minority groups living on oceanic islands. c. Those related with ancient navigations undertaken by British people. d. Those related with maritime activities undertaken by people from all backgrounds.