【单选题】He was trying to read ______ , the phone kept ringing.
【简答题】统计每个部门中人数( ) A.SELECT SUM(ID) FROM EMP GROUP BY DEPTNO; B.SELECT SUM(ID) FROM EMP ORDER BY DEPTNO; C.SELECT COUNT(ID) FROM EMP ORDER BY DEPTNO; D.SELECT COUNT(ID) FROM EMP GROUP BY DEPTNO;
【单选题】以下( )不属于湿式自动喷水灭火系统水流报警装置。
【单选题】青春期异常子宫出血病人基础体温特征,下列描述正确的是
【单选题】1897年,( )宣布改国号为大韩帝国,并追封被日本暗杀的闵妃为明成皇后。
【单选题】EXHIBIT, Emp Table Exhibit A Exhibit B Examine the data from the EMP table. Evaluate this SQL statement: SELECT * FROM emp WHERE emp _ id = 3); WHERE commission = (SELECT commission FROM emp What is t...
C.
The query returns no rows
D.
The query fails because the outer query is retrieving more than one column
E.
The query fails because both the inner and outer queries are retrieving data from the same table.
【多选题】陈维昭老师认为《红楼梦》的多层结构包括?
【单选题】He was then trying _____a new job.
【多选题】下列关于人工挖孔桩施工的安全要求中说法正确的是():
A.
参加挖孔的工人,事先必须检查身体,凡患精主自病、高血压、心脏病、癫痫病及聋哑的人等不能参加施工。
B.
每天上班前及施工过程中,应随时注意检查辘轳轴、支腿、绳、挂钩、保险装置和吊桶等设备的完好程序,发现有破损的现象时,应及时修复或更换。
C.
正在开挖的井孔,每天上班工作前,应对井壁、混凝土支护,以及井中空气等进行检查,发现异常专况,应采取安全措施后,方可继续施工。
D.
现场施工人员必须戴安全帽,井下人员工作时,井上配合人员不能擅离职守。孔口边2m范围内不得有任何杂物,堆土应离孔口边3m以外。