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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
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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.
【多选题】行星齿轮式自动变速器,有以下特点()
A.
4-5个行星排
B.
2-3个行星排
C.
3-5个传动比
D.
2-3个传动比
【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
【单选题】下图中，单行星齿轮的行星架是 .（ ）
A.
A
B.
B
C.
C
D.
D
【判断题】辛普森式行星齿轮机构的特点是有共用太阳齿轮,前后行星架也组成一体。
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
【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
【判断题】行星齿轮变速器是有级变速器，所以AT仍然是有级变速器。
A.
正确
B.
错误
【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】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