【简答题】to say publicly or officially
【单选题】The Chinese abacus(算盘), officially ______ as a cultural heritage at the 8th Annual UNESCO World Heritage Congress, is another symbol of Chinese wisdom.
【判断题】非语言沟通的特点是单渠道性和需要一定的反应时间。
【判断题】动力性运动可增大关节软骨的厚度,使之弹性增强。( )
【单选题】I am a teacher.What do you do?
【判断题】电力线路是用来传送电能的,按结构不同可分架空线路和电缆线路两大类。