大学MOOC 专业外语(年佳琪测控171-2)(沈阳工程学院)1451637217 最新慕课完整章节测试答案
第一周周三1-2节
测验1
1、单选题:
It is conventional to take the current flow as the movement of .
选项:
A: negative charges
B: positive charges
C: any charge
D: protons
答案: 【 positive charges】点我阅读全文
