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【判断题】

单个齿轮的规定画法中,轮齿部分不画剖面线。

A.
正确
B.
错误
题目标签:剖面线齿轮
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参考答案:
参考解析:
.
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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.

【单选题】剖面线12L表示该部件中心在:().

A.
距离机身结构对称中心线右边12英寸的位置
B.
距离机身结构水平基准面右边12英寸的位置
C.
距离机身结构对称中心线左边12英寸的位置
D.
距离机身结构水平基准面左边12英寸的位置