【判断题】The platform is one example of packaging component
【多选题】关于Spee曲线,正确的说法是
E.
为连接下颌切牙的牙尖、尖牙的牙尖、前磨牙的颊尖以及磨牙的近、远中颊尖的连线
【单选题】Wearing a harness with a lanyard attached to the platform can provide extra protection against falls,especially while the platform is in motion.
【单选题】-Why didn't you lock the door before you left? -I_____, but I forgot.