同学们对CO2是否支持常见金属的燃烧进行了如下探究活动：【活动一】探究CO2是

发布时间：2017-06-10 13:18 │ 来源：www.tikuol.com

题型：问答题

问题：

同学们对CO₂是否支持常见金属的燃烧进行了如下探究活动：

【活动一】探究CO₂是否支持实验室常见金属镁的燃烧

实验①：将燃着的镁条插入充满CO₂的集气瓶中，发现镁条仍在燃烧．观察生成

物，除白色物质外，还有黑色物质．

（1）镁在CO₂中反应的化学方程式为______．

（2）实验①的结论是______．由该结论可知______（写“能”或“不能”）用CO₂灭火器扑灭活泼金属的火灾．

（3）通过实验①你对燃烧条件的新认识是______．

【活动二】探究CO₂是否支持生活中常见金属铁的燃烧

实验②：将弯成螺旋状的细铁丝系上一支火柴，点燃火柴后立即将铁丝插入装有CO₂的集气瓶中，发现铁丝未燃烧．

某同学提出：如果实验②中细铁丝未得到充分加热，将对判断“CO₂是否支持铁的燃烧”造成干扰．他依据什么认为实验②中细铁丝未得到充分加热？

请你帮助他设计对比实验，排除干扰因素，证明CO₂是否支持铁的燃烧．

实验方法	可能观察到的现象和结论
	如果铁丝在装O₂和装CO₂的集气瓶中都燃烧，证明CO₂支持铁的燃烧
	如果铁丝在装O₂的集气瓶中燃烧，在装CO₂的集气瓶中逐渐冷却，证明CO₂不支持铁的燃烧

考点：设计实验和科学探究燃烧与燃烧的条件

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名著阅读（4分）

A相了相，走到树前，把直裰脱了，用右手向下，把身倒缴着；却把左手扳住上截，把腰只一趁，将那株绿杨树带根拔起．众泼皮见了，一齐拜倒在地，只叫：“师父非是凡人，正是真罗汉！身体无千万斤气力，如何拔得起！”

①这段文字出自古典名著《》，文段中的A的姓名是。（2分）

②请你用简洁的语句写出关于A的另一个故事：。（2分）

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完形填空。

                                             Eight ways to have a good school-life
    Your schooldays should be some of the best and happiest days of your    1 . How can you get the
   2   from them, and ensure you do not    3   this wonderful opportunity (机会) to learn?
   1 Be positive (积极) about school! Don't say things are difficult or   4 . Be interested in school-life
and your school subjects. Join lots of activities. Be quick to put your hand up. Go round the school with
a big smile.
    2 Expect to work. School is not a holiday camp. If you are not working, you are not learning, and
you are wasting your time at school. Teachers cannot make everything    5 .
    3 Keep fit. If you do not eat a good breakfast, you will be thinking about    6   in class. If you go to
bed    7   and do not have enough sleep, you will be sleepy in class. Play some sports to keep your body
strong.
   4 Do today's work today. Do not say you will do things    8 . if you get    9   the class, it is very
difficult to get back in front. You cannot finish a race if you rest all the time.
    5 Don't be too disappointed if things sometimes go   10 . Everyone fails some tests, loses some
matches and has bad days. Friends are not always perfect, and they sometimes say and do   11  things.
Don't let small problems seem very big and important.
    6 Talk about problems-sometimes they are only the result of misunderstanding. Don't be too
embarrassed (窘迫) to ask for help. You are young. No one thinks you can do   12 !
    7 Plan your time. Don't waste life   13  in bed on Saturday morning. Go and play a sport, learn
the piano, work on a project, read a book, practice English, or help someone   14  problems. There are
always a lot of things to do.
    8 Set targets (目标). If your last grade was a D, work for a C. Try to make   15  bit by bit. Think
of small targets:"I will speak in class four times this week", "I will finish my project on Wednesday" or
"I will get two more marks this week"
    Follow our advice, and have a happy school-life!

( )1．A．study
( )2．A．more
( )3．A．waste
( )4．A．easy
( )5．A．bad
( )6．A．weather
( )7．A．early
( )8．A．tomorrow
( )9．A．over
( )10．A．well
( )11．A．nice
( )12．A．anything
( )13．A．lie
( )14．A．of
( )15．A．promise

B．life
B．some
B．use
B．interesting
B．work
B．past
B．lately
B．today
B．behind
B．badly
B．pleasant
B．everything
B．lying
B．in
B．money

C．family
C．most
C．catch
C．boring
C．enjoyable
C．future
C．on time
C．at once
C．on
C．straight
C．unpleasant
C．something
C．ling
C．with
C．room

D．school
D．one
D．see
D．beautiful
D．careful
D．food
D．late
D．well
D．under
D．right
D．special
D．nothing
D．to lie
D．by
D．progress

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男性，50岁。颈粗20年，心悸、乏力1年，加重1个月。查体：尤突眼，甲状腺Ⅱ度肿大，不平，无触痛，可闻及血管杂音，心界不大，心率90次／分，可闻及期前收缩6～8次／分。则最可能的病因诊断是（）.

A.Graves病

B.结节性甲状腺肿伴甲亢

C.桥本病

D.甲亢性心脏病

E.单纯性甲状腺肿伴冠心病

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病历摘要：患者男性，35岁。上腹痛2年余，周期发作，进食后腹痛可暂时缓解。最近1个月持续性疼痛，体检左上腹局限性压痛，钡餐提示胃部龛影，直径1cm，经内科保守治疗8周后疼痛略有减轻。

结合病史应考虑哪些诊断？（）提示：病人在等候纤维胃镜检查过程中突然出现上腹部突发刀割样剧痛，查体：全腹压痛反跳痛．以剑突下为著，呈板状，肠鸣音消失。

A.急性阑尾炎穿孔

B.绞窄性肠梗阻

C.胃十二指肠急性穿孔

D.出血坏死性胰腺炎

E.急性胆囊炎穿孔

F.急性腹膜炎

G.急性肠穿孔

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汽提塔的蒸汽量大，不但造成轻柴油闪点（），而且造成分馏塔的负荷。

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