写出意思相反的词

粗—____    松—____    早—____    里—____

____—快   ____—无    ____—高   ____—后

    Billy doesn't go to school today. He wants to read a storybook. His brother bought(买)one for him yesterday. (1) Billy likes this book.

    Billy goes to his bookcase. The book is not there. Billy looks under the bed. but it isn't there. (2) No, it isn't. He looks inside his schoolbag,but he still(仍然)can't find the book. Billy isn't happy. (3) Billy goes to the living room(客厅). His mum is reading a book on the sofa.

    " (4) "asks Billy.

    "Which one?"says his mum.

    "The one about a dog. "says Billy.

    "It's in your brother's bedroom. "says his mum. "I found it on the table after breakfast. I thought it was his book. (5) "

    "Great! Thanks, Mum, "says Billy.

根据材料内容, 从方框中选择合适的句子填入文中空缺处, 使材料完整、通顺。

A. Is it under the chair?

B. Does he lose the book?

C. It is about a nice dog.

D. So I put it in his bookcase.

E. Mum, did you see my storybook?

⑴____ ⑵____ ⑶____ ⑷____ ⑸____ 

在▱ABCD中，过点D作DE⊥AB于点E，点F 在边CD上，DF=BE，连接AF，BF．

①酸 ②纯净物 ③氧化物 ④含氧酸 ⑤化合物⑥混合物 ⑦一元酸．