机床传动副中能实现旋转运动和直线运动相互转换的是() A.丝杠螺母传动(旋转变直线)

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问题:

机床传动副中能实现旋转运动和直线运动相互转换的是()

A.丝杠螺母传动(旋转变直线)

B.蜗杆蜗轮传动

C.齿轮齿条传动

D.齿轮传动

考点:模具钳工考试模具钳工考试题库
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读对话选择正确答案。

Mother: It's warm and sunny. Let's go to the clothes shop, OK?

Girl: OK! I want to buy a new dress.

Father: Let's go to the toy shop to buy a toy.

Girl: No! Now I am hungry.  Let's go to the restaurant to eat some hamburgers.

Mother and father: OK! Let's go.

Waitress: What would you like?

Mother: We would like some hamburgers.  How much for one?

Waitress: 5 yuan.

Mother: We'll take three, please.

Waitress: Here you are.

1. The weather in Shanghai is _______.

A. hot and sunny        

B. warm and rainy        

C. warm and sunny

2. What does the girl want to buy?

A. A new toy.            

B. A new dress.          

C. A new skirt.

3. How much for three hamburgers?

A. 5 yuan.              

B. 10 yuan.              

C. 15 yuan.

4. How many hamburgers do they want to buy?

A. One.              

B. Two.              

C. Three.

5. The father wants to buy ________.

A. a hamburger          

B. a toy                  

C. an animal

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与脐平面的皮肤感觉区相对应的脊髓节段为()

A.T6

B.T6

C.T10

D.T12

E.L1

题型:单项选择题

以下关于工程项目范围确认与质量控制的表述中,正确的是()。

A、范围确认是有关工作结果的可接受问题,质量控制是有关工作结果是否满足质量需求的问题 

B、范围确认与质量控制相同 

C、质量控制通常是在范围确认之前进行,这两个过程是串行执行的 

D、范围确认的输入包括项目分解结构字典,质量控制输入不包括项目分解结构字典

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绘图题:画出万用表测量电阻电路的原理线路图。

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影响扦插生根的环境因素有哪些?

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