下列不属于电教媒体的特点的是（） A.具有直接性 B.具有媒体的多样性 C.具有时空

一块三角形菜地的面积是540平方米，量得底边上的高是30米，这块菜地的底边长是______．

城市的总体规划是指( )。

A．近期内的或是当年的各项建设总的规划布置

B．会直接影响到城市的投入产出效益和经济运行效率

C．城市在一定年限内各个组成部分和各项建设的全面安排

D．城市总体规划、镇总体规划的分阶段实施安排和行动计划

--- What do you think of ____________ 8th China Flower Expo in our city?

--- It was ____________ big success, I think.

A．/; a

B．the; /

C．the; a

D．an; /

Why does the speaker ask the addressee to write in English a. Because the speaker cannot read Chinese. b. Because English is the working language. c. Because Chinese cannot be displayed properly in the speaker’s computer. d. Because English is the language in which the speaker’s computer is designed.

会展活动中风险管理的最终目的在于防患于未然。