搜题请搜索小程序“爱下问搜题”
问题 单项选择题

《城镇燃气设计规范》GB50028将燃气管道按压力分为（）。

A.3级

B.4级

C.5级

D.6级

答案

参考答案：B

补全对话，情景问答
选择合适的句子组成对话，把序号写在横线上。
A. You're right.
B. Oh, it's so big!
C. Where's my book?
D. Ten birds.
E. Look at the elephant.
F. It's under the bed.
G. What can you see?
H. I'm short. You're tall.
1.  _____________
2.  _____________
3.  _____________
查看答案
选择题

My aunt and uncle usually bring some gifts ______ me when they come to visit.[ ]

A. to          

B. for          

C. with          

D. on
查看答案