抽油杆的弹性伸缩发生在（）。_爱下问搜题

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问题填空题

抽油杆的弹性伸缩发生在（）。

答案

参考答案：上下冲程

完形填空

完形填空。

     Li Wen is an English 1 . He is not young, but he is not 2 . He's forty-eight. He, has a son.  3 name is
Li Lei. He is 4 . Mr Li teaches English.  5 his class there are fifty 6 . They all  7 him. His wife,  8 Li, is a
worker. She is  9 mother. Today is Sunday.  10 of Mr Li's family is at home.

( )1. A. worker
( )2. A. heavy
( )3. A. Her
( )4. A. fifteen
( )5. A. On
( )6. A. babies
( )7. A. are like
( )8. A. Mrs
( )9. A. the teacher's
( )10. A. Every

B. teacher
B. good
B. It's
B. fifty
B. ln
B. teachers
B. be like
B. Mr
B. the farmer's
B. One

C. friend
C. old
C. Your
C. five
C. Of
C. students
C. likes
C. Miss
C. Li Lei's
C. Everyone

D. farmer
D. new
D. His
D. fifth
D. With
D. boy and girl
D. like
D. Sir
D. the farmer
D. Everyone

填空题

《说文解字》从形、音、____________三个方面来解说汉字。