【单选题】下列既能承受径向力又能承受轴向力的轴承是 ( )
【判断题】经常总结经验有助于我们在学习中找到适合自己的学习方法。()
【简答题】In the long term, a number of materials presently in common use will probably become exhausted, notably some metals and some varieties of stone, but other materials will adequately replace them. The r...
【简答题】Tom has made big progress in his Chinese ________ he works very hard.
【判断题】经常总结经验有助于我们在学习中找到适合自己的学习方法。
【单选题】车辆走合期一般按规定减载()。(单选题)
【单选题】下列既能承受径向力又能承受轴向力的轴承是( )