最新人教版初三中考化学全册必背知识点考点总结归纳整理(精华)
常见元素化合价口诀:一价氯氢钾钠银,二价氧钙钡镁锌,二三铁二四碳,二四六硫都齐全;铜汞二 价最常见,三铝四硅五氮磷,单质零价要记清。 (2) 常见原子团(根)化学价口诀:负一硝酸氢氧根,负二硫酸碳酸根,正一价的是铵根。
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常见元素化合价口诀:一价氯氢钾钠银,二价氧钙钡镁锌,二三铁二四碳,二四六硫都齐全;铜汞二 价最常见,三铝四硅五氮磷,单质零价要记清。 (2) 常见原子团(根)化学价口诀:负一硝酸氢氧根,负二硫酸碳酸根,正一价的是铵根。
O,+oo)上有零点, 则实数 a 的取值范围是 . A. a S O B. a S 1 c: a 三0 D. a 2: 1 5 、 设等差数列{ an }的前 n 项和为 Sn ,己知吗+ a6 = 0
regard themselves socially different 【解析】选 D。细节理解题。根据第三段的内容可知, 一项最新的民 意调查发现 90%的人们仍然把自己放在一定的等级中。故选 D。 2. The
,椭圆的离心率为 e,①当 =45°时,e= ;②e 与 的关系为 .(本题 第一空 2 分,第二空 3 分) 三、解答题:本题共 6 小题,共 70 分.解答应写出文字说明、证明过程或演算步骤.本题包 括 必考题和选考题两部分
页 1 第 高三教学质量检测(Ⅰ) 数学试题(文科) 一、选择题:本大题共12小题,每小题5分,共60分.在每小题列出的 四个选项中,选出符合 题目要求的一项. 1.设全集 U=R, 集合 A={x|0
高三数学试题卷(共四页)——第 1 页 第一学期期末调研测试卷 高三数学 注意事项: 1.本科目考试分试题卷和答题卷,考生须在答题纸上作答. 2.本试卷分为第Ⅰ卷(选择题)和第Ⅱ卷(非选择题)两部分,共
上的值域为 2,1 ,其图像关于直线 2x 对称. 故选 D. 【考查意图】本题以三角函数为载体,考查三角函数图象变换与性质等知识,考查运算求解 能力、逻辑推理能力,考查化归与转化思想、数形结合思想,考查直观想象、逻辑推理、数
Ⅰ. 单句改错1. People often talk about Hangzhou, that is famous for the West Lake.2. He reached London in 1996, when, some time later, he became afamous actor.3. I have never been to Dalian, where is said to be an attractive city.4. The sun gives off light and warmth, who makes it possible for plants togrow.5. In an open boat, there were four men, one of who was a doctor.
C. 27.18% D.31.74% 5.已知 m , n 是两条不同的直线, , , 是三个不同的平面,则下列命题正确的是( ) A.若 //,mn ,则 //mn B.若 ,
Ⅰ. 根据所给的汉语释义或首字母写出单词的正确形式1. Although he is young, he is an __________ (有经验的)architect.2. As a matter of fact, drunken driving is as harmful as __________ (暴力的)crimes to people’s life and safety.3. What __________ (引起)the accident yesterday?4. A sudden storm __________ (发生)when we were having our pleasantvoyage in the Yellow River.5. One million and five hundred thousand people died in natural dbetween 1980 and 2000.
部编版三年级(下)语文期中测试卷(一) 时间:90 分钟 满分:100 分 同学们,经过一个学期的努力,你们一定有很大的收获吧!开动脑筋, 认真答题,相信你们会有出色的表现,赶快行动吧! 一、我会拼,也会写。(8
分,共 20 分) [ 13. 8 3 14. 1 2 15. 1 2 1n 16. 4 三、解答题(本大题共 6 小题,共 70 分) 17.解析:(1)设公差为d,则 1 1 1 4 19
__________ it on his own feet. 3 9. Fred 没有钱, 所以他决定找一份工作。 Fred didn’t have any money, so he decided ________________
页 1 第 高三期终调研考试卷 数学理科 注意事项及说明:本卷考试时间为 120 分钟,全卷满分 160 分. 一、填空题:本大题共 14 小题,每小题 5 分,共 70 分.不需要写出解答过程,请把答案直接
the smallest boy, 而 且又提到非常惊讶, 可以推断出这里是指他的观点和比他这个年龄 大三、四倍的人同样有价值, 故选 C 项。 9. A. education B. children C
Ⅰ. 用 although/but/however/while 填空1. John is more hard-working than his sister, ________ he failed in theexam.2. ____________ he is an experienced dancer, he still needs a lot ofluck in performing.3. There is not much time left. ____________ , we must get there ontime anyway.4. She went out, ____________ I stayed at home.5. She was tired, ____________ she still went on working.6. You will be lucky if you can go into the exhibition for a visit without aticket. ____________ , this does not always happen.7. You like playing tennis, ____________ I like reading.
______________ women take on more of the housework. 3 男性通常多是在外工作, 而女性则承担更多的家务。 10. He ____________ who the murderer
— 高三理科数学(八)第 1 页(共 4 页) — 理科数学(八) 本试卷分必做题和选做题两部分.满分150 分,考试时间120 分钟. 注意事项: 1.客观题每小题选出答案后,用 2B 铅笔把答题卡上对应题目的答案标号涂黑,如需改动,用
Ⅰ. 阅读理解In most developed countries the government providesfree education for children because it realizes that educatedcitizens are useful to the country in their later life. Mostcountries also have private education. This means that parents can payto send their children to certain schools. People who agree with thissystem say that it gives parents a larger choice of schools. Other peoplethink that private schools give the children who go to them an unfairadvantage over other children.
1 附件 1 三峡库区城镇水污染控制关键技术及应用 项目 公示材料 一、 一、 一、 一、 项目 名称 项目 名称 项目 名称 项目 名称 三峡库区城镇水污染控制关键技术及应用 二、 二、 二、 二、