2020-03-08到2020-06-30
1、 金属晶体中的线缺陷是（）
A:相界
B:空位
C:晶界
D:位错
答案: 位错
2、 面心立方晶格的配位数是（）
A:6
B:8
C:10
D:12
答案: 12
3、 晶面（110）和（111）所在的晶带，其晶带轴指数为（）
A:[-110]
B:[1-10]
C:[01-1]
D:[0-11]
答案: [-110];
[1-10]
4、 α-Fe比γ-Fe的致密
2020-10-22到2021-01-19
1、 II Here’s a paragraph that has both facts and opinions. Read and decide whether they are facts or opinions. New York and other U.S. cities have begun using vehicles powered by natural gas[1]. This is a good idea[2]. Vehicles that use natural gas do not pollute the air[3]. Furthermore, natural gas is more cost-effective than regular gas[4]. All cities should use only vehicles powered by natural gas[5].1. Facts are ___