煤矿企业安全生产管

下列属于矿井透水征兆的有( )

发布于 2021-03-23 18:24:23

【多选题】
A 煤层变湿、挂红、挂汗
B 空气变冷
C 顶板来压、片帮
D 底板鼓起或产生裂隙

关注者

0

被浏览

96

蓝色多瑙河 2023-03-23

这家伙很懒，什么也没写！

此回答被采纳为最佳答案，开通VIP会员可查看

1 个回答

撰写答案

请登录后再发布答案，点击登录

关于作者

86578981

这家伙很懒，什么也没写！

提问

回答

709

被采纳

709

关注TA

发私信

相关问题

1

Which of the following scientists should be listed as the top one?

2

The intentions of academic journals are the followings except for:

3

煤系顶、底部有强岩溶承压含水层时，主要( )必须布置在不受水威胁的层位中，并以石门分区隔离开采。

4

Journal metrics can be used in academic circles to ______.

5

Which metric is used to measure the productivity and impact of an author?

6

How many digits does ISBN have after 1st January 2007?

7

Which of the following citation indexes was not originally published by the Institute for Scientific Information (ISI)?

8

采掘工作面遇到下列情况之一时，必须确定探水线进行探水。( )

9

Which type of the following international conferences is listed as Number one conference in the world?

10

Which of the followings belongs to well-known citation indexes in China?

发布
问题

手机
浏览

扫码手机浏览

在线
客服