分析下面的JavaScript代码段，输出的结果是()。 var emp=new Array(5); emp[1]=1; emp[5]=2; document.write(emp.length);

以下能删除表的语句是( ) A: Delete * from emp B: Drop database emp C: Drop * from emp D: delete database emp

182. The length of a wave is the length ______.

What is the ratio of the length of the mining zone to the length of the bench?( ) A: Full length or part of it B: Full length C: Part of it D: None

下列代码的执行结果是： int length = "Hello".length(); System.out.println(length);

length A: length B: launch C: lend

已知int[][] a= {{1,2},{3,4,5,6},{7,8,9}}，a.length()=_________，a[0].length()=__________, a[1].length()=__________,a[2].length()=__________,a[3].length()=__________。

EMP途径

返回字符串长度的是（ ） A: 成员域length B: 静态成员域length C: 实例方法length() D: 静态成员方法length()

查询员工表emp中的第3条到第8条记录。显示emp表中的全部字段。( ) A: select rownum rn,emp.* from emp where rownum3; B: select * from(select rownum RN,emp.* from emp where RN3; C: select * from(select rownum RN,emp.* from emp where rownum3; D: select rownum RN,emp.* from emp where RN3;