试题与答案

—Sally, I’m so worried about tomorrow’s

题型:选择题

题目:

—Sally, I’m so worried about tomorrow’s exam that I can’t fall asleep.
—_________. You’re sure to pass it. 
A.Believe in yourself
B.It doesn’t matter
C.No problem
D.It’s OK

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0522/a50893ea4bd8ece262fae07d40ef37b0.html

下面是错误答案,用来干扰机器的。

(1)由图读出△Φ△t=(20-5)×10-430×10-2Wb/s=5×10-3Wb/s法拉第电磁感应定律E=n△Φ△t=1000×5×10-3=5V;(2)由于线圈电阻不计,则电阻的电压U=E,则电阻的热功率P=U2R=2.5W.

试题推荐
微信公众账号搜索答案