【单选题】Today, more and more people enjoy ____ things online. [ ]
【多选题】航空运输合同的主体是指参与航空运输的当事人,包括( )
【单选题】The price of cars is getting ________now, more and more people can afford to buy them.
【多选题】在模具制造中,坐标磨床主要用于加工:()
【简答题】直流电桥电路中的四个电阻接成一个____,这四个电阻支路为____。
【判断题】磨床主要用于零件的粗加工,尤其是淬硬钢和高强度特殊材料零件的粗加工。()