哪种方式通过对比页面变化能判断 sql 注入（）。
A: order 1 和 order 2
B: ' or 1=1 和' or 1=2
C: '和''
D: ' and 1=1 和' and 1=2
A: order 1 和 order 2
B: ' or 1=1 和' or 1=2
C: '和''
D: ' and 1=1 和' and 1=2
举一反三
- 请选择下面正确的SQL语句( ) A: select * from 表名 order by 列名1 and order by 列名2 B: select * from 表名 order by 列名1,列名2 C: select * from 表名 where 列1=值1 and 列2=值2 D: select * from 表名 where 列1=值1 and 列1=值2
- There are following business statements for an information system:①A customer submit 0 or more orders;②An order can only be submitted by one customer. There are two classes in the system “Customer” and “Order”. For each instance of Order Class, there are ____ instance(s) of Customer Class; while for each instance of Customer Class, there are ____ instance(s) of Order Class. A: (1) 1 (2) 1 B: (1) 1 (2) 1 or more C: (1) 1 (2) 0 or more D: (1) 0 or more (2) 1
- There are bond and bond in N2. A: 1σ和1π B: 2σ和2π C: 1σ和2π D: 2σ和1π
- 人的初级精母细胞、次级精母细胞和精子中染色体数目的比例与DNA分子数目的比例分别是 A: 4∶2∶1和4∶2∶1 B: 2∶1∶1和4∶2∶1 C: 2∶2∶1和2∶1∶1 D: 2∶1∶1和2∶2∶1
- 滑石（3MgO·4SiO2·H2O）和高岭土（Al2O3·2SiO2·2H2O）分别属于（ ）层状结构的硅酸盐矿物。 A: 1：1和2：1 B: 2：1和1：1 C: 1：1和1：1 D: 2：1和2：1