【题目】某无色气体A中可能含有Cl2、SO2、CO2、HCl气体中的一种或几种。
(1)将此气体通入氯水后溶液变得无色透明。
(2)将得到的溶液分为两份：①其中一份取出少量在试管中，加入用盐酸酸化的BaCl2溶液，出现白色沉淀。②另一份取出少量加入用硝酸酸化的AgNO3溶液，也得到白色沉淀。
试回答：
(1)气体A中肯定含有的气体是________，理由是____________。
(2)气体A中肯定不存在的气体是________，理由是__________。
(3)气体A中不一定存在的气体是________。
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小学生10分钟应用题系列答案科目：高中地理 来源： 题型：
【题目】七选五型阅读理解
根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
5 Ways to Get Work Done
As the day draws to a close, are you having trouble finishing your work? You don't need to end up with a sense of failure. In the hours left, the following ways can help you get things done to have a sense of achievement.
Trick yourself.
1 . So, try this: add something to your to-do-list that takes only 30 seconds to finish. Feeling a bit inspired? Then use as short a deadline to deal with another. Or focus on something by giving yourself only five minutes, and then work as long as you can.
Take lots of breaks.
Find yourself checking your cellphone or reading the Internet? 2 . Have some breaks, and you'll be able to face your work again with delight.
Use rewards.
One-hundred more words on this report, and you can have a cup of coffee. One more phone call, and you can check your personal email. 3 .
4 .
Most of us spend too much of our day sitting. It's bad for our health and bad for our concentration. Take a walk or do some jumping in a free meeting room—anything to get you refreshed and your brain working again.
Work as a team.
When you have a big project deadline coming up, you can even keep a meeting room and work in the same place. 5 , but also you'll feel more connected to your co-workers while doing it.
A. Get physical exercise
B. Don't feel guilty
C. Do things energetically
D. Notspan> only will you get more done
E. Rewards are wonderful motivators
F. Endless work makes us busy and tired every day
G. A feeling of having made progress will inspire you
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【题目】 根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
American Girl Is Finally Releasing Its First Boy Character Doll
American Girl has been making adorable dolls with inspiring stories for over three decades now—from Felicity to Molly to Samantha. They each come from different parts of the country, different moments in time, and in many ways, very different worlds. 1 According to the company’s website, though, that’s all about to change—American Girl will release its first boy character doll this Thursday.
2 And honestly, he couldn’t be a more welcome addition. As for Logan’s backstory? He’s a drummer from Nashville, Tennessee, who plays alongside his friend Tenney Grant, a singer-songwriter.
But the real reason why Logan’s entrance into the collection is so significant because in his own small way, he helps break the longstanding tradition that "dolls are just for girls"—and that’s huge.
Some may note that American Girl did technically introduce a boy in 2003 with the "Bitty Twins". 3 And it comes with a backstory just like the original American Girls.
4 In fact, the company will be releasing many more diverse dolls this year, including Gabriela McBride, an African American girl who manages her stutter with poetry. Z Yang, a Korean—American boy character, and later this year, a historical Hawaiian character named Nanea. 5 It is one of the original American Girl dolls.
A. His name is Logan Everett.
B. Not only girls are fond of dolls.
C. Additionally, they will be reintroducing Felicity.
D. Logan’s addition is actually just the frst step to vary its collection.
E. But until now, all of the dolls had one thing in common: they were girls.
F. However, Logan is the first full-sized boy character to be sold on his own.
G. Adding a boy to the lineup has been a number one request for a very long time.
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【题目】 书面表达（满分25分）
假如你校同学进行了一场有关高考英语听力测试的讨论。讨论的主题是：高考英语测试中的听力部分该不该取消？请你根据下表中的提示写一篇短文，介绍讨论的情况。
一些同学认为不应该取消 | 另一些同学认为应该取消 |
1. 听是语言的四项基本技能之一，不能忽视； 2. 听是获取信息的重要途径之一； 3. 国际合作日益增多，听说能力应加强。 | 1. 考试中各地收听效果好坏不一、不公平； 2. 英语教师和语音设备城乡差异过大； 3. 今后并非人人都要与外国人口进行头交流。 |
注意：
1. 词数100左右；
2. 可以适当增加细节，以使行文连贯；
3. 文章的开头已给出，不计入总词数。
考词汇：取消cancel 国际合作international cooperation
The students of our school had a discussion about whether listening test in the National Matriculation English Test should be kept or canceled.
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【题目】自然界有一种“雷雨发庄稼”的现象，即在雷雨过后，植物生长得更好。下面一段短文就是叙述雷雨中发生的一系列化学变化过程：
①空气中的N2在放电条件下与O2直接化合生成无色且不溶于水的一氧化氮气体；
②一氧化氮的密度比空气略大，不稳定，常温下就易与空气中的O2反应生成红棕色的二氧化氮气体；
③二氧化氮气体有毒，易与水反应生成硝酸(HNO3)和一氧化氮；
④生成的硝酸随雨水洒到大地上，同土壤中的矿物质相互作用，生成可溶于水的硝酸盐。
请填写下列空白：
(1)上述短文中，描述二氧化氮化学性质的是________(填序号)。
(2)实验室制取一氧化氮时，下列收集方法不适宜的是________。
A．向上排空气法
B．向下排空气法
C．排水收集法
(3)写出二氧化氮与水反应的化学反应方程式：____________________________________，其中氮元素的化合价在此反应中发生的变化是________。
A．不变 B．仅升高
C．仅降低 D．既有升高又有降低
(4)“雷雨发庄稼”，植物生长得更好的原因是__________。
A．生成的一氧化氮可以作为氮肥
B．生成的二氧化氮可以作为氮肥
C．生成的硝酸盐可以作为氮肥
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【题目】
根据句意及首字母或汉语提示写出单词。
【1】 Some people still believe in （魔法）.
【2】 He is a (代表) of his country.
【3】What is your v on school punishment?
【4】 People who work in banks know about 金融)．
【5】 Traffic in the city was （阻断）by a snowstorm.
【6】 It is the p of the government to improve education.
【7】Can you (区分) the different musical instruments playing now?
【8】They are （联合抵制）the shop.
【9】 Those who can (预见) difficulties on their way to success may keep calm when they really appear.
【10】 When will the eggs h ?
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【题目】书面表达
体裁 | 话题 |
提纲作文，申请信 | 申请成为亚运会志愿者 |
假定你是李华，亚运会(Asian Games)将在你居住的城市举办，现在正在招募志愿者，你希望成为其中一员。请按要求用英文给组委会写一封申请信。内容应包括：
1. 个人情况：年龄、性别、学历；
2. 个人条件：英语好、爱好体育、善于交往、乐于助人、熟悉本地情况；
3. 承诺：提供最佳服务。
注意：
1. 词100左右；
2. 开头和结尾已给出，不计入总词数。
Dear Sir/Madam,
My name is Li Hua. ___________________________________________________________________
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Yours faithfully,
Li Hua
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科目：高中地理 来源： 题型：
【题目】A
Scientists and marine biologistshad(海洋生物学家) something to celebrate last week when two lost humpback whales(座头鲸) returned to the Pacific Ocean. Delta and Dawn ― a mother and a baby ― had circled the Sacramento Bay area for two weeks before going back to the ocean.
＂We all shouted loudly like ‘Yay’!＂said Jim Oswald, a spokesman for the Marine Mammal Center. ＂It’s been really exciting.＂
The humpback whales were last spotted on May 29 near the Golden Gate Bridge in San Francisco, California. Scientists are sure that the whales swam into open water during the evening of May 29 or early the next morning, since there have been no further sightings of the whales. Even so, boats were sent out to look for them, just in case the whales made another wrong turn.
Officials spent two weeks trying to get the whales to turn back towards the ocean. Biologists played recordings of whale-feeding as well as unfamiliar sounds to try to make the whales head back to the Pacific Ocean.
However, Delta and Dawn gave scientists an unexpected chance to study humpback whales in the wild. Scientists were able to gather sound recordings and watch their behaviors. This is especially exciting because humpback whales are an endangered species. What’s more, scientists don’t usually have the chance to observe (观察) them in their natural habitat.
＂All those things are very hard to get,＂ said Oswald,＂So what we are doing is filling up the knowledge blank on humpback whales in the wild. ＂ Scientists should be able to use this information to help other lost whales in the future.
【1】Jim Oswald was very happy because____________.
A. the whales traveled to Sacramento Bay
B. the whales returned to the Pacific Ocean
C. the scientists held a great celebration
D. he found the lost humpback whales
【2】 In order to make the whales go back to the ocean, the biologists____________.
A. fed them with other animals B. swam into open water
C. played music for them D. played strange sounds to them
【3】 The fifth paragraph mainly tells us that____________.
A. humpback whales will disappear in the future
B. scientists are worried about humpback whales
C. humpback whales were excited in their natural habitat
D. scientists learned more about humpback whales
【4】What’s the best title for the passage?
A. Looking for the Lost Whales B. Helping the Lost Whales
C. The Lost Whales Returned D. Two Whales Were Lost
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【题目】在家鼠中短尾（T）对正常尾（t）为显性。一只短尾鼠与一只正常鼠交配，后代中正常尾与短尾比例相同；而短尾类型相互交配，子代中有一类型死亡，能存活的短尾与正常尾之比为2∶1，则不能存活类型的遗传因子组成可能是 （ ）
A．TT B．Tt C．tt D．TT或Tt
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