Some kinds of winds might cause illness or health problems, because().
A、winds from mountain regions blowing faster and faster warm and dry the air
B、researchers say there are more strokes and heart attacks during windy weather of this kind
C、bad headaches and asthma attacks are some possible examples of the effects of the winds
第1题:
有SQL语句: SELECTDISTINCT系号FROM教师WHERE工资>=; ALL(SELECT工资FROM教师WHERE系号="02") 与如上语句等价的SQL语句是
A.SELECTDISTINCT系号FROM教师WHERE工资>=; (SELECTMAX(工资)FROM教师WHERE系号="02")
B.SELECTDISTINCT系号FROM教师WHERE工资>=; (SELECTMIN(工资)FROM教师WHERE系号="02")
C.ELECTDISTINCT系号FROM教师WHERE工资>=; ANY(SELECT工资FROM教师WHERE系号="02")
D.SELECTDISTINCT系号FROM教师WHERE工资>=; SOME(SELECT工资FROM教师WHERE系号="02")
第2题:
有SQL语句:SELECT DISTINCT系号FROM教师WHERE 工资>=ALL (SELECT 工资FROM教师WHERE系号=\"02\") 与如上语句等价的SQL语句是
A.SELECT DISTINCT系号FROM教师WHERE工资>=(SELECT MAX(工资)FROM教师WHERE 系号="02")
B.SELECT DISTINCT系号FROM教师WHERE工资>=(SELECT MIN(工资)FROM教师WHERE 系号="02")
C.SELECT DISTINCT系号FROM教师WHERE工资>=(ANY(SELECT(工资)FROM教师WHERE 系号="02")
D.SELECT DISTINCT系号FROM教师WHERE工资>=(SOME (SELECT(工资)FROM教师WHERE 系号="02")
第3题:
The population between the age of 25 and 44 increased by 28.1%from 1980 to 1989 because()
Athis was the period of large inflow of young immigrants
Bthis was the birth age of the baby boomers.
Cthe large number born during WW II reached this age bracket
Dthose who were born in the period of baby boom reached this age bracket
第4题:
有SQL语句: SELECT DISTINCT 系号 FROM 教师 WHERE 工资>=; ALL(SELECT 工资 FROM 教师 WHERE 系号 =“02”) 与如上语句等价的SQL语句是
A.SELECT DISTINCT 系号 PROM 教师 WHERE 工资>=; (SELECT MAX(工资)FROM 教师 WHERE 系号=“02”)
B.SELECT DISTINCT 系号 FROM 教师 WHERE 工资=; (SELECT MIN(工资)FROM 教师 WHERE 系号=“02”)
C.SELECT DISTINCT 系号 FROM 教师 WHERE 工资>=; ANY(SELECT 工资 FROM 教师 WHERE 系号=“02”)
D.SELECT DISTINCT 系号 FROM 教师 WHERE 工资>=; SOME(SELECT 工资 FROM 教师 WHERE 系号=“02”)
第5题:
A.Cause2
B.Cause4
C.Cause7
D.Cause15
第6题:
重新加载fstab文件中的所有条目,需要使用的命令是()。
A.mount -d
B.mount -c
C.mount -a
D.mount -b