初三寒假作业答案.docx
《初三寒假作业答案.docx》由会员分享，可在线阅读，更多相关《初三寒假作业答案.docx（15页珍藏版）》请在冰豆网上搜索。
初三寒假作业答案
初三寒假作业答案
化
练习一
一、BCCBCDAA
二、BADAAACD
药匙10ML量筒试管夹
质软密度小于水银白色金属熔点低
能与水发生剧烈的反应
石棉网坩埚钳
防止反应生成的高温物体烫坏桌子
剧烈燃烧发出耀眼白光
烧杯破裂
试管破裂
酒精挥发完
标签被腐蚀掉
略
三、用湿抹布盖灭用水湿润
练习二
一、DBBBABCB
二、密度大于空气有助燃*
酒精灯，试管铁架台集气瓶
横放小药匙纸槽底部
受热均匀其中有空气使收集到的氧气不纯当导管口均匀不断的向外冒气泡的时
候
正无色
将导管从水槽中拿出来熄灭酒精灯
过滤吸附肥皂水
煮沸
紫色石蕊变红CO2与H2O生成一种酸性物质CO2+H2O=H2CO3
下面的先熄灭CO2密度大于空气
略
三、打开关闭关闭关闭打开变浑浊对比验证
练习三
一、AABBDBBABBAADBCA
二、2O2NenN2mFeFe2+Mg（+2）（OH）2
4SO2-
原子分子离子核内质子数核外最外层电子数
BCDEAABBCDEBCDEA
BCAD
酚酞变红分子在不停运动试管反映容器
练习四
一、CBDDBDBBAC
二、石油天然气煤不可再生混合物可燃物温度达到着火点有氧气
关闭阀门切断电源用盖子改灭co2不可然不助燃
可燃，不助燃略
练习五
一、BDDBADCCADDB
二、>
晶体析出的过程蒸发结晶法降温结晶法蒸发结晶法影响小降温结晶法影响大蒸发结晶法降温结晶法
7%6g
盖子没倒置5换小砝码50ML42.5加速溶解1，2略
练习六
一、ADADCABADDDC
二、CO2+Ca（OH）2=CaCO3+H2O
4Al+2O2=2Al2O3以下略
食醋盐酸水壶被腐蚀，水壶的壁便薄缩短寿命
FeOFe3O4Fe2O3略（1617）水稀释了车中的硫酸，使其与FE反映生成大量的氢气Fe+H2SO4=FeSO4+H2
>>>＜略
练习七
一、AlHeFe2+H2SO4
2+212
丙乙甲
=>
COCH4H2
略
分子在不停运动
加压可以使气体液化
火灾生吃
降低水的凝固点使其熔化
Fe+CuSO4=FeSO4+Cu
表面生成了一层致密的氧化膜
英
练习一
worryabout
bedividedinto
worrytoomuchabout
keepsecrets
quarrelwithsb
forgivesb.doingsth.
showoff
giveupeasily
takecareof
payattentionto
differentkindsofideas
devotetocharity
二．
modestgenerous
unluckyshy
hard-workinginpatient
impossibleunfair
inactivefull
dishonestincorrect
weakstupid
三.
tosave
notmeeting
toeat
explaining
putting
butterflies
planning
unfair
leader
energetic
三．
Whatishelike？
WhatdoesSamoftendreamabout？
Whichwomenisyournewteacher？
Theyweredividedinto4groupsbyMrzhang.
HisyoungsisteristakengoodcareofbyPeter.
Yourstarsignisdecidedbyyourbirthday.
Hismotherisverykindtohelpothers.
ThereisnothingwrongwithJim'smind.
Heiscleverenoughtosolvetheproblem.
Canyoutellmehowtogettothenearestshop?
五．
ADDABCDBADAC
六．
CDCDADABCD
七．
CACCCBD
八．
作文略练习二
一．
prefer
wouldrather
wouldrather
prefer
wouldrather
wouldrather
prefer
wouldrather
prefer
二．
1.nothing
2.noting
3.everybody
4.Nobody
5.anything
nothing
6.anyone
7.Anyone
8.everyone
9.something
10.everybody
三．
BABDACBCBB
四．
1.IpreferwatchingTVtogoingouttohaveawalkwithyou.
2.It'sagreatfuntochatwithothers.
3.Ifyoufellsadorscared,trytowearinyellow.
4.Shepaintedthewalllightblueandhopeitwillbringyousuccess.
5.Ithinkitisgoingtoraintonight.
五．
BCBCADBCDB
六．
CDCBDA
七．
作文略
练习三
一．
from
at
about
with
to
on
about
in
二．
feelstressed
havenochoicebuttodosth.
beveryvaluable
ontime
handin
giveupdoingsth.
plentyof
hearfromsb.
apieceofadvice
forgettodosth.
goouttilllatenight
beintrouble
三．
Though
attention
confidence
talented
pleasure
replied
miss
spare
四．
on
worries
shout
stressed
causing
weight
balance
covers
五．
1.getting
iscoming
2.follow
3.walk
4.todeal
5.listening
6.tohelp
toclean
7.drawing
8.tocatch
9.Totell
10.feel
11.smoking
12.Don't
13.tobuy
14.todiscuss
15.hasn'tfinished
16.tomeet
17.towrite
18.sitting
19.tostay
20.tosave
六．
CACDAACBDAD
七．
BCCABBDCCA
八．
CBDCDD
九．
作
练习四
一．
reported
especially
series
months
interviewing
director
prizes
cartoon
movie
announced
website
space
二．
DADBBACADD
三．
1、talking
2、think
lasted
3、fairly
4、muchhomeworktodothatIhavenotimetowatchTV
5、Whyarethesetigersbeingkilled？
6、a
of
四．
1、beautifully==>beautiful
2、hardly==>hard
3、back==>去掉back
4、all==>both
5、peoplearetalking==>去掉are
6、boring==>bored
9、thanyou==>那个you改为yours
8、any==>后面加other
9、more==>much
10、very==>改为much
11、in==>of
12、of==>in
五.
BCADABACBC
六．
BCADADDACB
练习五
一
1、actor
2、Shortly
3、becoming
successful
4、beauty
5、beginning
6、waschosen
7、needy
8、lying
二．
1、notonly
butalso
otherparts
2、mounded
loseof
3、beauty
charm
attractedattention
4、Duringherlifetime
earnedfourmorenominations
5、achievements
wentbeyond
industry
6、consider
notjustas
humanitarian
7、puts
most
to
8、later
received
interestinggift
9、explain
ofclass
10、sureifyouareright
三．
1、amI==>改为Iam
2、wasbecome==>改为wastobecome
3、to==>of
4、finally==>final
5、nottogo==>去掉to
6、rathertobe==>去掉to
7、enterintothe==>去掉into
8、include==>including
四．
1、hasdevoted
2、willtake
3、waswatching
4、dream
5、wastaken
6、look
willsee
7、werewatering
8、bring
五．
CBBCBADC
六．
CDDDBADCDC
七．
CCACADAACB
练习六
一．
energetic
represents
easily
thousand
quarrelling
advice
ours
shares
attacked
bored
二．
1、Theiceisthickenoughtoskateon.
2、Redcanhelpyoueasilymakeadecisionwhenyouhavedifficulty.
3、Idon'tknowhowtocheeryouup.
4、Sheisnotonlyprettybutalsopolite.
5、Thismorning,teachersaskedmewhyIwaslate.
三．
DBCADBBADACACB
四．
DCABACCACD
五．
BDCADDCBCA
六．
作文略
升级会员 