安装仪表引压管有一定的长度，一般不小于1m。

单词排队组句子。

1. meet, come, my, and, family (.)

_______________________________________________________

2. I, use, can, chopsticks (.)

_______________________________________________________

3. see, I, boards, can, two (.)

_______________________________________________________

4. is, he, grandpa, your (?)

_______________________________________________________

5. is, brother, your, what, doing (?)

_______________________________________________________

— What do you think of teaching, Bob?

— I find it fun and challenging. It is a job _____ you are doing something serious but interesting. [ ]

A. where

B. which

C. When

D. that

纳米乳（微乳）属于热力学稳定体系。（）

小说《茶花女》是法国作家______的作品。( )

A．雨果

B．小仲马

C．福楼拜

D．乔治·桑

叶丝线喂料机和计量管、皮带称组合是为了（）生产流量的。