钢管混凝土中承式拱桥是根据( )划分的。
A．承重结构的材料
B．跨越障碍的性质
C．行车道的位置
D．桥梁的全长
E．桥梁的用途
参考答案：A,C
从II栏中选出与I栏相应的答语：
I II
小题1:Whose pants are these? A. Four kilos of oranges, please.
小题2:Please give this letter to Peter. B. They are Joan’s.
小题3:What does your brother do? C. Thirteen yuan a kilo.
小题4:How many oranges would you like? D. Sorry, I don’t know him.
小题5:How much is the fish? E. He is a driver.
口令攻击的主要目的是（）
A、获取口令破坏系统
B、获取口令进入系统
C、仅获取口令没有用途
