【单选题】下列关于踏面擦伤的说法中正确的是
D.
踏面擦伤是车辆运行中制动力过大,抱闸过紧,车轮在钢轨上滑行,踏面局部被磨成平面
【单选题】下列哪项属性不属于创业活动的社会功能属性
【简答题】Acho que o nosso professor é ______________ (bom) professor que tenho até agora.
【简答题】根据《建设工程安全生产管理条例》规定,以下不属于列入建设工程慨算的安全生产所需资金的项目是( )。
【单选题】Professor Smith will come here to give a speech. All the preparations must be _____ before 5 o’clock.
【单选题】______, he will apologize for his rudeness towards the professor at the conference.