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举一反三
【单选题】⽛槽突修整术的⽬的不包括（ ）。
A.
矫正妨碍义齿戴⼊和就位的畸形
B.
去除⽛槽突突起的尖和嵴
C.
防⽌⽛槽突的⾻质增⽣
D.
去除突出的⾻结节和倒凹
E.
矫正上前⽛⽛槽突的前突
【单选题】Passage One ①The California Public Employees’ Retirement System(CalPERS) has positioned itself as the premier champion of investor rights, regularly singling out bad managers at some of the nation’s l...
A.
the NYSE did ignore its regulatory duties
B.
John Reed should resign like his predecessor
C.
the investors were dissatisfied with the NYSE
D.
the exchange should have its board reelected
【单选题】磨削表面有螺旋线的原因之一是，主要原因是砂轮圆周面上有凹凸现象，使磨削过程中砂轮与工件表面仅部分接触。砂轮修整不良或修整砂轮后未倒边角，此时可调整工作台在移动速度为（）的状态下重新修整砂轮，修后用白刚玉油石倒角。
A.
10～20mm/min
B.
30～50mm/min
C.
15～30mm/min
D.
20～40mm/min