【判断题】The teacher gave us some forms and told us to fill out them.
【判断题】( )轴承合金钢不必具有良好的导热性及耐蚀性。
【单选题】从()到脚的途径,电流对人的伤害最严重。
【简答题】Watch the video and fill in the blanks. u05v1.wmv
【单选题】从()到脚的途径,电流对人的伤害最严重。
【简答题】Watch the video again and fill in the blanks . u01v2.wmv