题型：问答题 简答题 常温下，下列各组离子在指定溶液中一定能大量共存的是A．使紫色石蕊试液变红的溶液：NH4＋、Al3＋、SO42－、Br－B．明矾溶液：K＋、C1－、S2－、OH－C．pH=1的溶液：Ag(NH3)2+、Fe3＋、ClO4－、NO3-D．能溶解Al2O3的溶液：Na＋、Mg2＋、HCO3－、SO42－ 查看答案
题型：问答题 简答题 短文改错。 One day, Li Ming with his grandpa were feeding a bird which kept in the cage when he noticed that the bird didn't happy at all. He couldn't understand why and thought the bird wherever he went that day. On her way to school, Li Ming was still thinking of the poor bird. Seeing some birds fly highly in the sky, Xiao Ming got an idea. As soon as he return home, he persuaded his grandpa set the bird free. He said,"If we love birds, we should give them free. Only by this way can we live in harmony with nature." 1. _____2. _____3. _____4. _____5. _____6. _____7. _____8. _____9. _____10. _____ 查看答案