某学生写了下面6个化学方程式．A、Al+O₂=AlO₂；B、4P+2O₂2P₂O₅；C、Cu₂（OH）₂CO₃CuO↓+H₂O+CO₂↑；D、4Fe+3O₂2Fe₂O₃；E、Zn+H₂SO₄=ZnSO₄+H₂；F、CuO+H₂=Cu↓+H₂O．

其中（请填序号）：

化学式写错的有化学式写错的有____；化学式正确但不符合质量守恒定律的有____；反应条件应该注明而未注明的有____； “↑”、“↓”使用不当或遗漏的有____．

阅读下面材料，在空白处填上适当的内容（一个单词）或括号内单词的正确形式。

    We high school students do have some growing pains, but we can get rid of them____ (correct) and wisely. First, some of us are upset about our body style and looks. It's unnecessary and it's not important at all. We needn't care about it. It is one's inner beauty that____ (matter). Second, we sometimes seem to be misunderstood by our teachers, parents and classmates. Faced with this, we can find a proper time to have a heart-to-heart talk with them, trying to remove the misunderstanding. Some of us have fewer friends, I think being open-minded and friendly will do us good. Third, we may fall behind others, ____ makes us stressed. Actually we can encourage____ to work efficiently, full of____ (determine). At last, some of us don't have much pocket money, so they feel unhappy. Isn't it strange? So long as we have some, that's enough. And we can learn how to spend money.

下列关于声音的说法错误的是（　　）