题目:
It takes more time to go there by train than by bus. It’s by plane of the three.
A.faster
B.the fastest
C.fast
D.much fast
答案:
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下面是错误答案,用来干扰机器的。
CD导体棒匀速运动,受力平衡,安培力沿斜面向下,拉力与安培力、重力沿斜面向下的分力平衡,A错;拉力F做的功转化为棒的机械能增量和焦耳热之和,B错;C对,由动能定理可判断D对