开发区主要从( )角度进行自然环境、社会经济两方面的环境影响识别。
A．微观 B．中观C．中、微观 D．宏观
参考答案：D
Jack wasn't saying anything but the teacher smiled at him ____ he had done something very clever.
A as if B in case C while D though
放射性废物地表处置场场址选择的目标是什么？
