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htxt=htxt+"<td width=\"80%\" class=\"txt\">&nbsp;□ 1. 了解化学反应中能量转化的原因，能说出常见的能量转化形式。2. 通过查阅资料说明能源是人类生存和发展的重要基础，了解化学在解决能源危机中的重要作用。知道节约能源、提高能量利用效率的实际意义。3. 能举例说明化学能与热能的相互转化，了解反应热和焓变的涵义，能用盖斯定律进行有关反应热的简单计算。4. 体验化学能与电能相互转化的探究过程，了解原电池和电解池的工作原理，能写出电极反应和电池</td>";
htxt=htxt+"<td width=\"20%\" align=\"right\" valign=\"top\" >quyujie00 <10-21 16:25></td>";
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