筛缝尺寸具体设计时应按最小充填砾石尺寸的（）来确定筛缝尺寸。
A、1/3～1/2
B、1/4～1/3
C、1/5～1/4
D、1/2～2/3
参考答案：D
根据句意和提示完成单词。
1. What's she doing for v_____?
2. That s_____ nice.Who are you going with?
3. He d_____ to go swimming on weekends.
4. She is going bike r_____ with her friends tomorrow.
5. Are you going to _____ (希腊) or Spain?
6. They are going _____ (远足) in the mountains next Sunday.
7. The English songs sound _____ (有趣的).
邓 * * 理论首要的和基本的理论问题是“什么是社会主义，怎样建设社会主义”，要搞清楚“什么是社会主义”，关键是
A．要进一步认清社会主义的本质
B．要坚持党的基本路线不动摇
C．要坚持马列主义毛 * * 思想不动摇
D．要理论联系实际
