5吨比8吨少______%,8吨比5吨多______%.
(8-5)÷8
=3÷8
=37.5%;
(8-5)÷5
=3÷5
=60%;
故答案为:37.5,60
膈有哪些裂孔?各裂孔内有什么结构穿行?
统计