摘要:(一)知识 掌握下列重点词汇和短语 Pardon n.& v.原谅,宽恕 Mistake n.错误 Make a mistake犯错误 As soon as 一--就-- Greeting n.问候,欢迎 Society n.社会 Culture n.文化,文明 Given name 名 Family name 姓 Manner n. 礼貌,方式,方法 Polite adj.有礼貌的 Praise v.表扬 Trouble n.麻烦,困难 理解下列词汇和短语 Bruce布鲁思 Confused adj.迷惑的,糊涂的 Confusing adj.莫名其妙的,难以理解的 Unusual adj.不同寻常的,与众不同的 Nick 尼克 Giggle v.咯咯地笑 Forgive v.宽恕,原谅 Costom n.习惯,风俗,习俗 Formal adj.正式的,庄重的 Joe 乔 Rude adj.粗野的,粗鲁的 Tradition n.传统 Peppermint n.薄荷糖,薄荷 Bradshaw布莱特肖 掌握下列句型 Pardon? Excuse me! I beg your pardon. I’ m sorry. No problem. Don’t worry about it! Never mind. Your finger has the same DNA as your hair. Li Ming looks like his father. China is very different from Australia. Good manners in North America are different from good manners in China. Western customs are different from Chinese customs. 语法 过去将来时的用法The Future-in-the-Past Tense 结构:过去将来时由助动词should/would+动词原形构成. Would常简缩为'd, 如I'd, you'd.he'd等,would not常缩写为wouldn't. 提示:注意第一人称用should, 其他人称用would (在美国.甚至在英国.第一人称也常用would). 用法:过去将来时表示过去某一时间看将要发生的动作或存在的状态. 过去将来时常用在宾语从句中.如: I didn't know if he would come. They never knew that population would become a big problem. She didn't tell me where she would go. Betty said she would visit the Great Wall next Saturday. 过去将来时也可以用was/were going to +动词原形来表示.如: I wasn't sure whether she was going to speak at the meeting. I was sure that they were going to do that. 注:从过去某时看将来要发生的事.还有一些其他的表达形式. He didn't say when she was coming. The teacher said that we were having a holiday next Monday.

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研究化学反应原理对生产生活很有意义,请用化学反应原理的相关知识回答下列问题:

(1)用铅蓄电池电解甲、乙两电解池中的溶液。已知铅蓄电池的总反应为:Pb(s)+PbO2(s)+2H2SO4(aq)2PbSO4(s)+2H2O(1)。电解一段时间后,向c极和d极附近分别滴加酚酞试剂,c极附近溶液变红,下列说法正确的是____________
(填写序号)
A.d极为阴极
B.若利用甲池精炼铜,b极应为粗铜
C.放电时铅蓄电池负极的电极反应式为:
PbO2(s)+4H+(aq)+(aq)+4e-PbSO4(s)+2H2O(1)
D.若四个电极材料均为石墨,当析出6.4g Cu时,两池中共产生气体3.36L(标准
状况下)
(2)某二元酸H2A在水中的电离方程式是:H2A=H++HA-;HA-H++A2-,请回答下列问题:
①Na2A溶液显_________(填“酸性”、“中性”或“碱性”),理由是________________
(用离子方程式表示)。
②已知0.1mol·L-1的NaHA溶液的pH=2,则0.1mol·L-1的H2A溶液中氢离子的物质的量浓度可能是__________0.1lmol·L-1(填“<”、“>”或“=”),理由是:___________________________.
(3)二甲醚是一种重要的清洁燃料,利用水煤气合成二甲醚的三步反应如下:
①2H2(g)+CO(g)CH3OH(g); △H=-90.8kJ·mol-1
②2CH3OH(g)CH3OCH3(g)+H2O(g); △H=-23.5kJ·mol-1
③CO(g)+H2O(g)CO2(g)+H2(g);△=-41.3kJ·mol-1
写出水煤气直接合成二甲醚同时生成CO2的热化学反应方程式___________________.
(4)SO2是硫酸生产的重要中间产物,也是空气污染的主要原因之一,其氧化生成SO3的反应为:2SO2(g)+O2(g)2SO3(g)。在一定温度下,将0.23 mol SO2和0.11 mol氧气放入容积为l L的密闭容器中发生反应,达到平衡后得到0.12 mol SO3,则反应的平衡常数K=________。若温度不变,再加入0.50 mol氧气后重新达到平衡,则SO3的体积分数将___________(填“增大”、“不变”或“减小”)。
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