螺杆泵的地面驱动装置将动力传递给井下（），使转子实现行星运动_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

螺杆泵的地面驱动装置将动力传递给井下（），使转子实现行星运动。

A.定子

B.转子

C.抽油杆

D.抽油泵

答案

参考答案：B

补全对话，情景问答

请将所给句子的编号填在横线上，补全每组对话。

A. You should eat a lot of vegetables and fruit.
B. Take this medicine twice a day.
C. I have a headache.
D. She needs to go to hospital.
E. You shouldn't eat a lot of fast food and sweets.

1. Mum: What's the matter, John?
    John:
2. Doctor:                Stay in bed and have a rest.
    Emma: Thank you, doctor.
3. Mum: Sue has a rest.
    Dad:
4. Dentist:                 They're not good for your teeth.
    Sam: What should I eat?
    Dentist:

判断题

积极、深入并有计划地向群众宣传精神障碍的有关知识是精神障碍一级预防的重要内容。()