⑴Do you want some rice?____             A. Thanks.

⑵What do you want to drink?____       B. Yes, I do.

⑶Can I help you?  ____                         C. I want some bread.

⑷Here you are.____                               D. Water, please.

⑸Do you want coffee or tea?____         E. I want some tea, please.  

苯酚及其衍生物广泛存在于工业废水中，对环境有严重危害．小明同学准备依据图1操作步骤，从处理废水的活性污泥中分离筛选酚降解高效菌株．请回答下列问题：