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【多选题】
舰船、潜艇和鱼雷的辐射噪声与自噪声的异同点有( )。
A.
噪声源基本相同
B.
辐射噪声为远场噪声，自噪声为近场噪声
C.
在声纳方程中起的作用不同，辐射噪声为SL，自噪声为NL
D.
自噪声的传播路径复杂，而且可变
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参考解析：
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【单选题】The report came to the British on May 21, 1941. The German battleship Bismarck, the most 1 warship in the world, was moving out into the Atlantic Ocean. Her task: to destroy the ships 2 suppli...
A.
end
B.
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C.
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D.
day
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A.
It was attacked by Russian torpedoes.
B.
Most of its passengers were frozen to death.
C.
Its victims were mostly women and children.
D.
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【单选题】防止噪声危害的最根本措施是
A.
制定合理的噪声卫生标准
B.
控制和消除噪声源
C.
合理的厂区规划和厂房设计
D.
控制噪声的传播和反射
E.
使用有效的个人防护用品