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【单选题】
POM齿轮工作时具有( )特点,无噪声。
A.
热稳定性好
B.
耐候性好
C.
耐剪切
D.
自润滑
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参考答案：
举一反三
【单选题】Passage 3 Questions 11 to 15 are based on the following passage: Scientists in India have invented a new way to produce electricity. Their invention does not get its power from oil, coal or other fuel...
A.
Because bullocks have long been used by Indian people
B.
Because bullocks walk slowly and are easy to control.
C.
Because there are few non-working bullocks in India
D.
Because there is not enough oil in India.
【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】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】Passage 3 Questions 11 to 15 are based on the following passage: Scientists in India have invented a new way to produce electricity. Their invention does not get its power from oil, coal or other fuel...
A.
Because bullocks have long been used by Indian people
B.
Because bullocks walk slowly and are easy to control.
C.
Because there are few non-working bullocks in India
D.
Because there is not enough oil in India.
【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】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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