固体废物管理规划的具体步骤（）；（）、规划模型开发、规划方案生成及后优化分析
参考答案：总体设计、数据调查与分析
Last night Mr. Crook didn't come back at the usual time. ___, he met some friends and stayed out
until midnight.
[ ]
A. Meanwhile
B. However
C. Instead
D. Yet
大庆油田分布的省区是[ ]
A．黑龙江
B．辽宁
C．山东
D．甘肃
