搜题请搜索小程序“爱下问搜题”
问题 判断题

混凝土的浇筑如因故必须间断时，其间断时间应小于前层混凝土的初凝时间或能重塑时间。 ( )

答案

参考答案：对

解析： 间断时间小于前层混凝土的初凝时间或能重塑时间，才能保证混凝土黏结为一体，不致分层。

多项选择题

基本换流单元包括（）。

A.换流变压器

B.交流滤波器

C.直流滤波器

D.控制保护装置
查看答案
完形填空

短文首字母（共10小题，每小题1分，满分10分）

One day I found a little girl sitting in the park unhappily. Lots of people passed by but never

s 小题1:   to see why she looked so sad. As I got closer I saw that her back  had a strange shape. That’s a hump (驼背)! Perhaps that was the reason w 小题2:   people just passed by and make no effort (努力)to help. I sat down beside her and said, “Hello!” Then she, in a low v 小题3:   said, “Hi.” I smiled and she smiled b 小题4:   , shyly. Then we talked there u  小题5:  it got dark. I asked the girl why she was so sad. She looked at me and said with a sad face, “Because of the hump.”

“But, you make me t 小题6:   of an angel (天使), sweet and friendly,” I said. She looked at me and asked, “Really?” I said, “Yes, I think you are an angel and you come here to watch over all those people walking by.” When she h  小题7:  this, the little girl jumped up. “I am! I’m an angel!” I was happy because she was no sad any m   小题8:  .

After that, my life also changed. I learned how to s  小题9:  both happiness and sadness with others. I believe now we give something to others in the s   小题10:  way we get the same.
查看答案