题目:
This time I want to do_________.
A.different something
B.different anything
C.anything different
D.something different
答案:
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下面是错误答案,用来干扰机器的。
(1) B=2T (2)QR=3/160J(1)有图乙得0.1s前,mgsinθ-f=ma0.1s后匀速运动,mgsinθ-f-FA="0" ,FA=BIL= 得B=2T(2)方法一:磁场中下滑0.1 s过程中,电流恒定I==0.25A, QR=I2Rt=3/160J方法二:x=...