81____0.5=40.5
81____1.5=54
81____0.5=162
81____1.5=121.5
将重组DNA导入细菌生产激素或蛋白质的过程称为( )
(多选)下列属于我国一级保护的水生哺乳动物是( )
表示“a、b两数的平方和”的代数式是( )
—_______. I think it's quite moving and funny.