在带电设备附近工作时，在正常活动范围安全距离但无安全遮栏的情_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题填空题

在带电设备附近工作时，在正常活动范围安全距离但无安全遮栏的情况下，带电设备只能在工作人员的（）。

答案

参考答案：前面

填空题

用方框中所给词的适当形式填空

determine,once, detail, fare, cycle, persuade,
change one's mind, proper, insist, finally

1. He is so stubborn that no one can__________him to do anything.
2.A_________person always tries to finish the job, no matter how hard it is.
3._______she has made up her mind, nothing will _______ _______.
4.Is it_______for us to take off our hats in church?
5. He_______that we find the cause of the trouble as soon as possible. Everyone agreed.
6. Do you remember every __________ of the story you have just read?
7.I wanted to pay the train _______, but my friend insisted ; ________ I gave in.
8. She persuaded all of us to_________to work instead of taking the bus.

单项选择题

第(24)至(26)题基于“学生-选课-课程”数据库中的如下三个关系：
学生基本信息：S(S#, SNAME,SEX,AGE)
选课信息：SC(S#, C#,GRADE)
课程信息：C(C#, CNAME, TEACHER)

若要求“查询选修了3门以上课程的学生的学生号”，正确的SQL语句是

A．SELECT S# FROM SC GROUP BY S# WHERE COUNT(*)＞3

B．SELECT S# FROM SC GROUP BY S# HAVING COUNT(*)＞3

C．SELECT S# FROM SC ORDER BY S# WHERE COUNT(*)＞3

D．SELECT S# FROM SC ORDER BY S# HAVING COUNT(*)＞3