只用一种试剂就可以鉴别NaOH、Ca（OH）2和H2SO4三种溶液，该试剂是（ 发布时间：2017-07-17 17:04 │ 来源：www.tikuol.com 题型：选择题 问题： 只用一种试剂就可以鉴别NaOH、Ca（OH）2和H2SO4三种溶液，该试剂是（ ）A．碳酸钾溶液B．紫色石蕊试液C．氯化钡溶液D．酚酞试液
题型：选择题 短文改错。Two friend met a bear when they went through a forest by foot. One of them ran to nearest tree and climbed up very quick. He forgot his friend. He thought only of herself. His friend knew bears didn't eat dead men. And he didn't move when the bear came to him. Then the bear go away. The man in the tree smiled and said, "What did the bear say to you?" His friend answered, "He said I needed an new friend."1_____________ 2_____________ 3_____________ 4_____________ 5_____________ 6_____________ 7_____________ 8_____________ 9_____________ 10____________ 查看答案