制作人的口腔上皮细胞临时玻片标本时，刮取细胞的部位，在载玻片上滴加的液体和染色的液体（  ）

I need some __________. Can you give me __________?

下列证明细菌对落叶有分解作用的实验步骤，错误的是（    ）

    There are many animals in the nature park. On the weekend, we go to the nature park with our teacher. Look! Two pandas are climbing trees. Three birds are singing.

Two tigers are playing on the grass. The monkeys are swinging.

    There is a hill in the park. Some students are in the woods. Chen Jie is playing with John. Zhang Peng and Mike are drinking water. Where is Sarah? Oh! She is watching the ants.