题干

现有下列8种物质:①Na2CO3②NaHCO3③HCl④NH4HCO3⑤C2H5OH⑥Al⑦食盐水⑧CH3COOH
上一题 下一题 0.0难度 选择题 更新时间:2016-01-19 03:21:29

答案(点此获取答案解析)

同类题5

阅读诗歌回答后面小题。
                                                                                                              跌 倒
                                                                                                              牧 也
                                                                                                       风,跌倒了
                                                                                                      才有了美丽的落叶
                                                                                                      云,跌倒了
                                                                                                      才有了滋润大地的雨水
                                                                                                       所以
                                                                                                       我们不再害怕跌倒
                                                                                                       让我们在跌倒时
                                                                                                       用最美丽的姿势
                                                                                                        站起来