A:将废弃物混在垃圾中填埋在土壤里
B:将废弃物焚烧
C:将废弃物用化学方法加工成涂料或汽油
D:将废弃物倾倒在海洋中
下列有关玻片标本制作的操作过程,顺序正确的是( )
①盖上盖玻片
②将生物材料放入水滴中
③用吸水纸吸去多余的水
④在载玻片中央滴一滴清水.
- Junior high school days will be over _______ a week. How are you feeling?
- I'm trying to keep my cool because we've been together ________ three years.
下列物质属于同分异构体的一组是 ( )