使平面α∥平面β的一个条件是(   )

用括号中的试剂除去下列物质中所含杂质,所用试剂错误的是(   )

根据短文内容，选择最佳答案。
B
    Hello! My name is Kate. This is my bag. It's a nice bag, right? It is from my mother.
    What's in my bag? A ruler is in it. And the ruler is white. It's not mine. It's Lily's. Lily is my sister. She likes white but I don't. Two pencils are in it, too. One is red and the other is blue. They are mine. Look, a nice watch is in it. The watch is white and blue. It's mine and it's from my father. A notebook is in my bag, too. The notebook is yellow and blue. Is this notebook mine? No, it's Anna's. Anna is my cousin. She likes yellow and blue very much.

下面（  ）是循环小数．

文中括号内应填入的词是(      )

①狼嚎的声音在荒原上　　　，在空中交织成一片危险的罗网。

②他蹲在苔藓地上，嘴里　　　　着一根骨头。

③但是内在的生命却　　　着他前进。

④他的另一只手已经慢慢　　　　过来，一下把狼抓住。