变速器常啮合齿轮的啮合印痕应在轮齿啮合面中部,且不小于啮合面的()。A、50% B、 发布时间:2017-07-26 11:56 │ 来源:www.tikuol.com 题型:单项选择题 问题: 变速器常啮合齿轮的啮合印痕应在轮齿啮合面中部,且不小于啮合面的()。A、50%B、60%C、70%D、80%
题型:单项选择题 I felt it hard to keep up with my classmates. But whenever I want to ____________, my teacher always encourages me to work harder.A.go onB.give upC.run awayD.give back 查看答案