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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.
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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】图像目标的空间细节在图像中可分辨的最小单元称为图像的（）
A.
光谱分辨率
B.
时间分辨率
C.
空间分辨率
D.
地面像元分辨率
【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】DA25型凹底平车允许通过最小曲线半径()。
A.
145m
B.
150m
C.
160m
D.
180m
【单选题】B级型车与C级型车相比，比值最大的年份与比值最小的年份相比，比值相差：（ ）
A.
2.
B.
2.84
C.
3.56
D.
2.44
【单选题】立式金属罐的最小测量容量是指在收发作业时，罐所排出或注入的最小液体体积。一般为（）液位高度所对应的容量。
A.
1m
B.
2m
C.
3m
D.
0.5m
【单选题】设某棵三叉树中有40个结点,则该三叉树的最小高度为( )。
A.
3.0
B.
4.0
C.
5.0
D.
6.0
【单选题】三变量最小项可以表示成（ ）。
A.
m6
B.
m1
C.
m3
D.
m5
【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】齿顶圆的代号是 。
A.
d
B.
d a
C.
d f
【单选题】与-780°终边相同的最小正角是
A.
-60°
B.
60°
C.
-300°
D.
300°