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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.
【多选题】当普铁接触网电缆直埋敷设时，电缆表面距地面不应小于“ ”m，穿越农田时不应小于“ ”m。（ ）
A.
0.7
B.
1
C.
1.2
D.
1.5
E.
0.5
F.
0.3
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】鼻腭神经局麻的表面标志为
A.
鼻腭神经局麻的表面标志为 切牙乳头
B.
腭大孔
C.
腭小孔
D.
颏孔
【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】膜的形态结构主要研究观察膜的断面与表面。
A.
正确
B.
错误
【判断题】开式齿轮的主要失效形式是点蚀
A.
正确
B.
错误
【判断题】( ) 曲轴轴颈表面不允许有横向裂纹。
A.
正确
B.
错误
【单选题】某齿轮箱中一对45号钢制调质齿轮，经常发生齿面疲劳点蚀破坏，修配更改时，可采取的措施有（）
A.
用40Cr钢调质后替代
B.
适当增大齿轮模数m
C.
适当增大齿数z
【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】真空钎焊炉门的密封圈表面要有尽可能多的真空油脂。
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
【多选题】当普铁接触网电缆直埋敷设时，电缆表面距地面不应小于“ ”m，穿越农田时不应小于“ ”m。（ ）
A.
0.7
B.
1
C.
1.2
D.
1.5
E.
0.5
F.
0.3
【单选题】乳腺癌时，癌细胞侵及纤维组织，乳房悬韧带缩短，牵引皮肤内陷，使皮肤表面呈
A.
“新月征”
B.
“牛癣征”
C.
“酒窝征”
D.
“灯泡征”