【单选题】某连续变量数列分为五组:第一组为500以下,第二组为500~600,第三组为600~700,第四组为700~800,第五组为800以上。依习惯规定( )。
【单选题】We express our thoughts ________ words and body language. [ ]
【判断题】Body language is not as important as spoken language.
【单选题】Well done ! The customers were _____ by your wonderful body language. [ ]
B.
to have been impressing
C.
to have been impressed
【多选题】______ belong to body language.
C.
pointing to one's own nose
D.
lay sb's hands on his necks
【简答题】绘制三相异步电动机接触器按钮双重联锁正反转控制线路的电路图,并分析工作原理。