【单选题】【消耗次数：1】
高转速发动机豪华大客车的主减速器齿轮形式应该选择（）。
①
螺旋锥齿轮；
②
双曲面齿轮；
③
圆柱齿轮；
④
蜗轮蜗杆
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【多选题】
关于主减速器锥齿轮的正确概念为：（）。
①
同等条件，双曲面齿轮较螺旋锥齿轮的尺寸小；
②
同等条件，双曲面齿轮较螺旋锥齿轮的尺寸大；
③
同等条件，双曲面齿轮较螺旋锥齿轮的传动比大；
④
同等条件，双曲面齿轮较螺旋锥齿轮的传动比小
【填空题】
为磨合均匀，主减速器主、从动锥齿轮齿数之间应避免有[填空1]。
【填空题】
采用斜齿圆柱齿轮的齿轮齿条式转向器应该采用[填空1]轴承。
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