梁式楼梯梯段的传力结构主要组成不包括下列( )。
A．梯段板B．斜梁C．平台梁D．踏步板
参考答案：A
根据I栏的问题在Ⅱ栏中选择正确的答话。
Ⅰ
( )1. What are the boys doing?
( )2. Let's play ping-pong.
( )3. When do you want to go to the movies?
( )4. What are they talking about?
( )5. Do you want to go shopping with me?
Ⅱ
A. Let's make it at six, OK?
B. That sounds fun.
C. They are playing temiis.
D. Sure-, I'd love to.
E. An interesting place.
下列选项中属于需要进行经济影响分析项目中的重大基础设施项目的是( )。
A．铁路、高速公路B．油田开发、气田开发C．科技、国防D．经济、科研
