调度主站系统事故变位报警反应时间(包括事故推画面)一般应小于多少秒() A.10S

题型:单项选择题

问题:

调度主站系统事故变位报警反应时间(包括事故推画面)一般应小于多少秒()

A.10S

B.5S

C.3S

考点:电力水利自动化电力水利自动化题库
题型:单项选择题

2008年9月,夏季达沃斯论坛年会在中国天津举办。有“经济联合国”的达沃斯经济论坛花落中国天津说明

①中国经济发展越来越吸引世界的目光 ②世界经济论坛与中国的合作进一步加强 ③中国的完全市场经济地位得到了世界各国的承认 ④区域集团化趋势加强

A.①②

B.③④

C.②③

D.②④

题型:单项选择题

句型转化.

1.Are you hungry? My mother asked me.

My mother asked me _______ I _______hungry.

2.The fact is this. We have lost the game.

The fact is ______ we ______ ______the game.

3. His business was failed, and he owed a lot of money.

His business was failed, and he _____ ______ ______.

4. We need to reduce the cost of the party.

We need to _______ _______ the cost of the party.

5. I have never heard a more beautiful song than this.

This is ______ ______ ______ song I have ever heard.

题型:单项选择题

三相异步电动机定子绕组是三相对称绕组,共有6个出线端,3个起始端和3个末端。()

题型:单项选择题

专题检查经常用来检查( )。

A.出现故障后修复时间较长的设备

B.精度高的设备

C.出现故障停休时间长的设备

D.专门修理项目

题型:单项选择题

露天作业的轨道起重机,当风力大于( )级时,应停止作业。

A.5
B.6
C.7
D.8

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