晶体中原子的结合力类型有哪些？
参考答案：晶体中原子结合力的类型有：离子型，共价型，金属型及范德瓦尔斯结合力。
My English teacher had a trip to the USA last summer. Which picture did she take there? [ ]
A. B. C. D.
在易燃易爆危险场所，禁止穿戴化纤织物。
B.
C.
D.