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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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参考答案：
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【单选题】滚动轴承采用定向装配时，轴承运转应灵活，无噪声，工作时温度不超过（ ）。
A.
25℃
B.
50℃
C.
75℃
D.
100℃
【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.
sea
C.
fight
D.
day
【单选题】Part ADirections: Read the following four texts．Answer the questions below each text by choosing A, B, C or D ．Mark your answers on ANSWER SHEET 1.It was the worst tragedy in maritime (航海的) history, s...
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.
It caused the largest number of casualties.
【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
相关题目：
【单选题】滚动轴承采用定向装配时，轴承运转应灵活，无噪声，工作时温度不超过（ ）。
A.
25℃
B.
50℃
C.
75℃
D.
100℃
【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.
sea
C.
fight
D.
day
【单选题】Part ADirections: Read the following four texts．Answer the questions below each text by choosing A, B, C or D ．Mark your answers on ANSWER SHEET 1.It was the worst tragedy in maritime (航海的) history, s...
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.
It caused the largest number of casualties.
【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
参考解析：
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