【题目】电离能是指由气态原子或气态离子失去电子需要的能量。从中性原子中移去第一个电子所需要的能量为第一电离能(I1),移去第二个电子所需要的能量为第二电离能(I2),依此类推。现有5种元素A、B、C、D、E,其中有三种金属元素,一种稀有气体元素,其I1~I3分别如下表。
元素 | I1/eV | I2/eV | I3/eV |
A | 13.0 | 23.9 | 40.0 |
B | 4.3 | 31.9 | 47.8 |
C | 5.7 | 47.4 | 71.8 |
D | 7.7 | 15.1 | 80.3 |
E | 21.6 | 41.1 | 65.2 |
根据表中数据判断其中的金属元素有 ,稀有气体元素有 ,最活泼的金属元素是 ,显二价的金属元素是 。
科目:高中地理 来源: 题型:
【题目】11月21日,“2016感动顺义”——顺义区第六届道德模范评选表彰活动颁奖典礼在顺义影剧院举行。王毅伟等20人获得道德模范提名奖。这些道德模范
①都带有各自所处时代的不同道德印记
②集中体现了社会主义文化的前进方向
③具有生生不息和历久弥新的感染力
④是各族人民团结奋斗的共同思想基础
A.①② B.②③ C.①④ D.②④
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【题目】 用which,why,where或when改写以下句子。
1. The school year starts on the first of September.
The first of September is the day _________________________________________.
2. My brother stopped smoking because it is bad for his health.
The reason _________________________________________.
3. We went to Shanghai on our school trip.
The city _________________________________________.
4. I most like the late night show on TV.
The TV program _________________________________________.
5. My father works in a factory that makes telephones.
The factory _________________________________________.
6. She did her homework in this room.
This is the room _________________________________________.
7. I told you about the town on the phone.
This is the town ____________________________________.
8. Why is Tin Tin popular among children of different countries?
Do you know the reason __________________________________________?
9. Maybe one day we don’t have to go to school but just study at home.
The day may soon come _________________________________________.
10. I grew up in the small village and I’ll go back there after graduation.
After graduation, I will go back to the small village ___________________________________.
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【题目】完成句子
1. I lived in _____________________and I used to write about the Olympic Games a long time ago.
我生活在你们所说的"古希腊",并且我曾写过很久以前的奥运会的情况。
2. ____________________ they’re called the Winter Olympics.
那就是它们被叫作"冬季奥运会"的原因。
3. No other countries could join in, ______________________ slaves or women!
其他国家不能参加,奴隶和妇女也不可以!
4. ________ in the Summer Olympics ________ you have the running races,together with swimming,sailing and all the team sports.
跑步、游泳、帆船和所有团队项目都是在夏季奥运会上进行。
5. There’s __________________ competition among countries to host the Olympics ________ to win Olympic medals.
国与国之间争取奥运会承办权的竞争就跟争夺奥运奖牌一样激烈。
6. I had to sit down and rest __________________________.
我每4分钟就得坐下休息。
7. So just how do you __________________________?
那么,你该如何从竞争者中脱颖而出呢?
8. He will __________________________across the Atlantic.
他将参加一次重大的横渡大西洋的比赛。
9. You can swap out one system and ______________________.
您可以交换一个系统并且用其他的系统替换它。
10. But I also ______________________ he would probably not find my answer very helpful.
不过我也承认,他很可能觉得我的答案并没有什么帮助。
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【题目】用价层电子对互斥模型推测下列分子或离子的立体构型。
(1)H2Se ;(2)NH2- ;
(3)BBr3 ;(4)CHCl3 ;
(5)SiF4 。
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科目:高中地理 来源: 题型:
【题目】下表为某些化学键的键能(单位:kJ·mol-1)。
共价键 | Cl—Cl | Br—Br | I—I | H—Cl | H—Br | H—I | H—H |
键能 | 243 | 193 | 151 | 431 | 366 | 298 | 436 |
(1)下列氢化物中,最稳定的是__________。
A.HCl B.HBr C.HI D.HF
(2)1 mol H2在2 mol Cl2中燃烧,生成2 mol HCl气体,放出能量__________kJ。
(3)相同条件下,X2(X代表Cl、Br、I)分别与氢气反应,若消耗等物质的量的氢气时,放出热量最多的是__________。推测1 mol H2在足量F2中燃烧比在足量Cl2中燃烧放热__________(填“多”或“少”)。
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【题目】单词拼写
结合语境,根据汉语提示用单词的适当形式填空。
1. Mary explained what we were to do ________ (简要地).
2. We are all impressed by her total ________ (投入) to her job.
3. He was hurt falling off his bike, and now his shoulders are still ________ (疼痛的).
4. Let’s go to the theatre first and eat at a restaurant ________ (后来).
5. We must ________ (分类) out the good apples from the bad ones.
6. Thanks for the ________ (邀请) to your birthday party.
7. To write such a book, one needs experience in ________ (除了) to time.
8. The children like to ________ (蘸) their bread into the milk.
9. To succeed, first of all, you should be ________ (有信心的) about yourself.
10. We didn’t have a receiver ________ (灵敏的) enough to pick up the signal.
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【题目】科学家发现的C60是一种新的分子,它具有空心、类似于足球的结构。最近科学家又确认存在着另一种分子“N60”,它与C60的结构相似,在高温或机械撞击时,其积蓄的巨大能量会在一瞬间释放出来。下列关于N60的说法中不正确的是( )
A.N60是由共价键结合而成的空心球状结构
B.N60和14N都是氮的同位素
C.N60的熔、沸点不高
D.N60可能成为很好的火箭燃料
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【题目】Where are the speakers going?
A.To a shop.
B.To the railway station.
C.To a restaurant.
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