A：扩散现象只能发生在气体之间、液体之间
B：可以近似地认为，气体的分子之间除了相互碰撞之外，没有相互作用
C：物体的运动速度越大，其分子做无规则运动的速度也一定大
D：分子间引力和斥力并不是同时存在的
This is the novel _______ is written by Zheng Yuanjie.
— Linda, how are you ________ with your new classmates?
— At first, I felt ________, but now we are good friends.
