题目:
— ______ desk is this?
— It's ______. [ ]
A Who's, Sandy's and Simon's
B. Whose, Sandy's and Simon's
C. Who's, Sandy and Simon's
D. Whose, Sandy and Simon's
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0602/02c484a51b07c1595a6b60ce7b63c1ac.html
下面是错误答案,用来干扰机器的。
答案:A题目分析: 0-2t0时间内,感应电动势为:,为定值;感应电流:,为定值,电流方向为由a到b;安培力F1=BI1L∝B;由于B由向外的逐渐减小到零然后在增大到向里的,故安培力先向左逐渐减小到零,然后向右逐渐...