快乐天使2005
幼苗
共回答了23个问题采纳率:95.7% 举报
make a workpiece using/by ironhide ; the original workpiece is a cylinder and now you need to truncate a part of it,which is line(可以省略) ab(height) about 54 cm,line ad(height) about 46cm,and line bd (diameter) about 15 cm.how many square centimeters is needed to take at least?
c
1年前
1