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【单选题】
关于分贝下列叙述正确的是( )。
A.
(A) 两个相同的物理量取以10为底的对数
B.
(B) 两个相同的物理量取以10为底的对数，并乘以10
C.
(C) 比值是指基准值与度量值之比
D.
(D) 量纲存在并随度量值而变化
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题目标签：分贝
参考答案：
参考解析：
刷刷题刷刷变学霸
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A.
merely
B.
average
C.
worsening
D.
the degree of loudness
E.
we are exposed
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A.
essentially
B.
particularly
C.
obviously
D.
similarly
【单选题】Noise Pollution Psychologists now believe that noise has a considerable effect on people’s attitudes and behavior. Experiments have proved that in noisy situations (even temporary ones), people would ...
A.
can not complete his work in a noisy situation
B.
will suffer from complete deafness because of noise pollution
C.
can be psychologically affected by working in very noisy factories
D.
may cooperate well in a noisy surrounding