下列木工工具中,发明者是鲁班的有()。
A.曲尺
B.锯子
C.铲子
D.刨子
参考答案:A, B, C, D
When you are home,give a call to let me know you__________safely.
A are arriving B have arrived C had arrived D will arrive
超声波美容仪作用于人体的机械作用可以()。
A.减肥降脂
B.增强细胞新陈代谢
C.安静神经
D.扩张毛孔