The Beijing Olympics is the geographically farthest Olympic Games to Mongolia.()
查看答案
钛合金强度和硬度相对较低,且导热系数高,切削温度有限,化学磨损很小,宜进行高速切削。()
互联网+智能制造,使得产业形态从生产型制造向全生命周期的服务型制造转变。()
粒径2.5微米以下的颗粒物主要来自道路扬尘等。()
The first thing to keep a long friendship is to contact with your friends not too often.()