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【单选题】
某厂生产一种产品。其固定成本为200000元,单位产品变动成本为10元,产品单价为15元,盈亏平衡点的产量应为( )A.
40000
B.
20000
C.
不确定
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举一反三
【简答题】shell编程文件测试中,测试文件是否可写是选项是( )。
【单选题】以下查询语句正确的有( )
A.
select * from tableA where name=’ 张三 ’;
B.
select * from tableA where name=’ 张 %’ && age>20;
C.
select * from tableA desc;
D.
select * from tableA group by age;
【多选题】以下查询语句中各子句顺序使用正确的有( )
A.
Select sdept,count(sno) From student Where sname like ‘王%’ Group by ssex ,sdept Having ssex='女' Order by sdept Desc
B.
Select count(sno) From student Where sname like ‘王%’
C.
Select count(sno) From student Having ssex='女'
D.
Select count(sno) From student
【简答题】以下查询语句中各子句顺序使用正确的有( )A. Select sdept,count(sno) From student Where sname like ‘王%’ Group by s ,sdept Having s='女' Order by sdept Desc B. Select count(sno) From student C. Select sdept,count(sno)...
【简答题】按照选课数据库xk,创建一个数据库及库里的所有表,完成后执行以下查询语句,要求没有报错, 以截图为证。 use xk --打开数据库 xk select * from dbo.Class --查询班级表 select * from dbo.Course --查询课程表 select * from dbo.Department --查询院系表 select * from dbo.StuCo...
【多选题】以下查询语句中各子句顺序使用正确的有( )
A.
Select sdept,count(sno) From student Where sname like ‘王%’ Group by ssex ,sdept Having ssex='女' Order by sdept Desc
B.
Select count(sno) From student
C.
Select count(sno) From student Where sname like ‘王%’
D.
Select sdept,count(sno) From student Order by sdept Desc
【多选题】以下查询语句中各子句顺序使用正确的有( )
A.
Select sdept,count(sno) From student Where sname like ‘王%’ Group by ssex ,sdept Having ssex='女' Order by sdept Desc
B.
Select count(sno) From student Where ssex='女'
C.
Select sdept,count(sno) From student Group bysdept
D.
Select sdeptFrom student Order by sdept Desc
【多选题】以下查询语句中各子句顺序使用正确的有( )
A.
Select sdept,count(sno) From student Where sname like ‘王%’ Group by ssex ,sdept Having ssex='女' Order by sdept Desc
B.
Select sdept From student Order by sdept Desc
C.
Select count(sno) From student Where sname like ‘王%’
D.
Select sdept,count(sno) From student Group by sdept
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