如下图所示的灭火方法错误的是[ ] A． B． C． D．

7.Your mother is coming. What present_______for your birthday?

A．you think she has got

B．you think she has got

C．do you think she has got

D．do you think has she got

下列河流水源主要来自冰雪融水的是[    ]

A、塔里木河

B、辽河

C、珠江

D、海河

论述磷酸淀粉的制法以及用途。

设X→Y是—个函数依赖，且对于任何

,X'→Y都不成立，则称X→Y是一个

在批处理操作系统中设计作业调度算法时，应当考虑的两个因素是 【5】 和高效性。