如图中已标明通电螺线管的N、S磁极,请在线圈上标出电流方向. 发布时间:2017-06-19 14:20 │ 来源:www.tikuol.com 题型:问答题 问题: 如图中已标明通电螺线管的N、S磁极,请在线圈上标出电流方向.
题型:问答题 Shirley,a real book lover,often brings home many books to read ____ the library. [ ]A. in B. for C. by D. from 查看答案