填料塔内填料的作用是增大（）（）液两相的接触面积。
参考答案：气；液
发动西安事变的国民政府十七路军将领是[ ]
A．张 * *
B．杨靖宇
C．杨虎城
D．李宗仁
The author implies that which of the following is the type of scientific explanation most likely used by a molecular biologist（）
A．Experimentation.
B．Reduction.
C．Interaction.
D．Generalization.
