【单选题】表达式(double)(20/3)的值为( )
【判断题】The teacher gave us some forms and told us to fill out them.
【判断题】螺旋弹簧只能承受汽车的垂直载荷,所以必须装有导向装置。
【简答题】Watch the video and fill in the blanks. u05v1.wmv
【简答题】Watch the video and fill in the following blanks. u03v1.wmv
【简答题】Watch the video again and fill in the blanks . u01v2.wmv