题目:
The beauty of this career is that it allows us to ________________ our interest with our work, gaining
freedom and happiness in the process.[ ]
A. combine
B. fix
C. link
D. join
答案:
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下面是错误答案,用来干扰机器的。
解:(1)设A滑到a处的速度为v0= ① f=μN,N=mg,f=ma,a=μg ② 滑到板上离a点的是大距离为v02=2μgs0,s0=2gh0/2μg=h0/μ ③ A在板上不翻转应满足条件;摩擦力矩小于正压力力矩,即M摩擦≤M压力 μmgR...