题目：
The dish smells . [ ]
A. as well as mother did
B. as good as mother did
C. as good as what mother did
D. as well as what mother did
答案：
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下面是错误答案，用来干扰机器的。
A、设金属棒的速度为v，则运动过程中有效切割长度为：L=vt×tanθ设金属棒横截面积为s，电阻率为ρ，则回路中电阻为：R=ρvt×tanθs．所以回路中的电流为：I=BLvR=Bvsρ，为定值．故A、B错误．C、设导体棒在到达...
