(4分)将影响反应速率条件的编号填在空格处。
A.温度
B.催化剂
C.固体的表面积
D.溶液的浓度
A C B D
用所给词的适当形式填空。
1. _________ (be) someone in that house yesterday?
2. He is tired, he wants _________ (sleep).
3. We have fun _________ (visit) the zoo.
4. My mother _________ (ask) me to go shopping with her yesterday.
5. _________ they _________ (watch) a movie last Thursday?
建立市场调研与预测信息系统的系统设计阶段主要包括()。
A.系统分析
B.基本设计
C.可行性分析
D.详细设计
E.系统评价