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【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】Section BDirections: There are 2 passages in this section．Each passage is followed by some questions or unfinished statements．For each of them there are four choices marked A, B, C and D．You should de...
A.
working in complete harmony with the rest of the society
B.
a humble component of the society, especially when working smoothly
C.
a necessary part of the society though each individual's function is negligible
D.
an unimportant part in comparison with the rest of the society, though functioning smoothly
【单选题】In general, our society is becoming one of giant enterprises directed by a bureaucratic management in which man becomes a small, well-oiled cog (齿轮) in the machinery. The oiling is done with higher wa...
A.
they are likely to lose their jobs
B.
they have no genuine satisfaction or interest in life
C.
they are faced with the fundamental realities of human existence
D.
they are deprived of their individuality and independence
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】齿轮的润滑主要靠（）
A.
边界油膜
B.
刚性油膜
C.
弹性油膜
【判断题】标准齿轮的划线一般应先划出齿顶圆。
A.
正确
B.
错误
【单选题】Section BDirections: There are 2 passages in this section．Each passage is followed by some questions or unfinished statements．For each of them there are four choices marked A, B, C and D．You should de...
A.
working in complete harmony with the rest of the society
B.
a humble component of the society, especially when working smoothly
C.
a necessary part of the society though each individual's function is negligible
D.
an unimportant part in comparison with the rest of the society, though functioning smoothly
【判断题】m,α,ħa*,c*都是标准的齿轮是标准齿轮。
A.
正确
B.
错误
【单选题】齿轮的渐开线形状取决于它的 ( ) 直径。 A 齿顶圆 B 分度圆 C 基圆 D 齿根圆
A.
1
B.
2
C.
基圆
D.
4
【单选题】该齿轮的分度圆半径r,基圆半径rb，齿顶圆半径ra分别为：
A.
B.
C.
D.
【多选题】开式齿轮的主要失效形式是__。
A.
轮齿折断
B.
齿面磨损
C.
齿面胶合
D.
齿面点蚀
【单选题】齿轮齿顶圆的计算公式是:( )。
A.
d=mz
B.
da=m（z+2）
C.
df=m（z-2.5）
D.
a=m（z1+z2）/2
【判断题】在标准齿轮中，相互啮合的两齿轮，其齿距可以不等。()
A.
正确
B.
错误
【单选题】齿轮的渐开线形状取决于它的（）直径。
A.
齿顶圆
B.
分度圆
C.
基圆
D.
齿根圆
【判断题】自动变速器中的齿轮都是行星齿轮。()
A.
正确
B.
错误
【单选题】In general, our society is becoming one of giant enterprises directed by a bureaucratic management in which man becomes a small, well-oiled cog (齿轮) in the machinery. The oiling is done with higher wa...
A.
they are likely to lose their jobs
B.
they have no genuine satisfaction or interest in life
C.
they are faced with the fundamental realities of human existence
D.
they are deprived of their individuality and independence
【单选题】汽车变速箱齿轮是?
A.
动力装置
B.
传动装置
C.
执行装置
D.
控制装置
【单选题】只要（）的齿轮就能互相啮合。
A.
齿数和模数相同
B.
模数和压力角相同
【单选题】齿顶圆的代号是 。
A.
d
B.
d a
C.
d f