You have your choice of three _____ of ice cream.

He gave us a good ____ of his experience.

This mountain range has many high _____ and fertile valleys.

His proposal is _____ to all of us and you do not need to tell us more about it.

框架梁、柱中心线宜重合，当梁、柱中心线间有偏心时，下列哪种说法是正确的?

工业废水的处理过程是将废水中所含有的各种污染物与水分离或加以分解，使其净化的过程。混凝、气浮方法属于（）。

理想流体是（）。

低压验电笔一般适用于交直流电压为（）v 以下。

“用寒远寒，用热远热”属于

住院患者常常会从同病房的病友中学习如何对待治疗或手术。这种学习现象符合哪种心理学原理