细解巧练九上数学(青岛)答案只要第一章特殊四边形和第三章一元二次方程就行了 很急!

因为Al(OH)3不溶于弱碱,只能在强碱（NaOH、KOH等）的作用下,才能溶解.
Al(OH)3 + OH- = AlO2- + H2O
弱碱NH3H2O不能使氢氧化铝溶解

你做出来的就是答案，加油。

每箱X
4X:(3X+10)=6:5
20X=18X+60
X=30
4x30+3x30+10=220

令g(x)=1/2
1-2x=1/2
x=1/4
所以f(1/2)=[1-(1/4)²]/(1/4)²=15

小伙伴，我看不到你的问题呀~

( )1.__ I was talking on the telephone,David came in.
A.Because B.While C.If
( )2.He was sleeping late _____ someone knocked on the door.
A.when B.while C.as
( )3.An alien got out _______ the UFO and walked _______ the street.
A.off；on B.from；along C.of；down
( )4.—What were you doing at this time yesterday?
—I _______.
A.sleep B.slept C.was sleeping
( )5.Seeing a UFO is a _______ thing.
A.amazing B.amazed C.amaze
( )6.The girl was _______ at the strange noise.
A.scared B.scare C.scaring
( )7.He is ill.I know he is _______ now.
A.in the hospital B.in hospital C.at the hospital
( )8.She was _______to hear the news.
A.surprised B.surprise C.surprising
( )9.Is he _______ to clean the outside of the windows or only the inside?
A.suppose B.supposed C.supposing
( )10._____ whether he will come or not.
A.I’m sure B.I’m not sure C.I’m sure not that
( )11.They said they ___ a party at 8:00 last night.
A.were having B.are having C.had
( )12.He had a cold this morning,so he went to the _______.
A.doctor B.doctor’s C.doctor’s home
( )13.Mother got mad _____ me for watching TV for hours.A.at B.about C.for
( )14.There is a big apple tree _____ the room.
A.in front of B.in the front of C.in front
( )15.You speak English as _____ as Jack.
A.well B.good C.better
( )16.We sat on the lake bank face to face ___ silence
A.on B.in C.with
( )17.—I find my pen _______.But I can’t find it ______.
—Don’t worry.Sooner or later you’ll find it _____.
A.somewhere ; anywhere ; everywhere
B.everywhere ; anywhere ; somewhere.
C.anywhere ; somewhere ; everywhere
( )18.She didn’t think about _____ outside the station.
A.to look B.looking C.looked
( )19.When I returned,I saw him ___ on the bed.
A.lie B.lying C.laid
( )20.Xiao Hong is scared of ____ English.
A.learn B.learning C.to learn
( )21.What ____ she _____ this time last Friday?
A.were,doing B.is,doing C.was,doing
( )22.What happened ____ you?
A.to B.for C.in
( )23.My mother ______ in the kitchen when the phone rang.
A.is cooked B.is cooking C.was cooking
( )24.______we were eating dinner in the restaurant,the owners dog took my bag away quietly.
A.Until B.While C.As soon as
( )25.There are only three chairs here.We need one______.
A.more B.other C.another
( )26.______beautiful day it is!
A.What B.How C.What a
( )27.My father is a policeman.He wears a uniform on weekdays but he has on his _______ clothes at weekends.
A.every day B.everyday C.new
( )28.There are ten ______ young people in the playground.
A.hundred B.hundreds C.hundreds of
( )29.He is ill.I know he is _______ now.
A.in the hospital B.in hospital C.at the hospital
( )30 The Smiths are watching the men’s table tennis match after dinner.（替换练习）
A.Mr.Smith B.The Smith C.The Smith family
A.用所给单词的适当形式填空.
1.You can’t get out of your seat during the ____­­­__ (fly),because it’s dangerous.
2.When that plane took off,this one has already landed in the airport_______ (safe).
3.I’m going to the _______ (barber) to get my hair cut.
4.This film is very ________ (surprise) and I’m __________ (surprise) at it.
B.根据首字母或汉语提示完成单词.
1.What s________ clothes you’re wearing today!You look so funny.
2.Their father went to Shanghai on b__________ not for leisure.
3.Lucy,have you ever spoken to a f__________ to practice your English?
4.We must think more others,we must not think only of _________(我们).
5.A_________ (事实)speaks louder than words.
二、用所给动词的正确形式填空.
1.—What_____ you_____(do) when he arrived?—I ___________(watch) TV at that time.
2.When I___________ (walk) in the street,I__________ (meet) my best friend Jim.
3.Mum_________ (buy) my father a nice coat and a pair of trousers last Sunday.
4.While my parents were doing some cleaning,my sister_________ (shout) to me loudly.
5.When he saw the thief steeling things in the office,he closed the door and ________ (call) the police.
6.I first met my girl friend two years ago,she__________ (work) in the supermarket.
7.Thank you for_________ (teach) us so well,my dear teacher.
8.What________ your parents_________ (do) at nine o’clock last night?

什么意思?是解释么?rn气化是物体由固体状态直接变成气体状态,没有中间的液体状态.例如:干冰气化rn凝华则是由气体状态直接转变为固体状态,没有中间的液体状态.例如:碘气的凝华

1.18+24+20=62=2*（红+黄+其他）
则红+黄+其他=31
已知红黄两色共有18面
那么其他颜色的有31-18=13面
2.21+26-（42-2）=7人
两种球都会打的有7人
不懂发信~

a²+a-1=0
a³+2a²+2012
=a(a²+a-1)+a²+a-1+2013
=2013

P=ρgh=1000*9.8*24=235200帕斯卡=0.235MPa
ρ--水密度1000Kg/m3
g--重力加速度,9.8
h--高度

我没有该试卷

设在极坐标系中,一点坐标为（a,b）(b为一角度),直线方程为Aρcosθ+Bρsinθ+C=0
则该点到直线方程的距离公式
lAacosb+Basinb+Cl/(A^2+B^2)^1/2
这道题中A=0 B=1 C=2
带进公式l0+1*1*sin(π/4)+2l/(0+1)^1/2=2+2^(1/2)/2

|1/2007-1/2006|-|1/2008-1/2006|+|1/2008-1/2007|
=(1/2006-1/2007)-(1/2006-1/2008)+(1/2007-1/2008)→这步就是去绝对值,正数不变,负数提取负号.
=1/2006-1/2007-1/2006+1/2008+1/2007-1/2008
=0

没有这个的

put away 是个动副结构的短语名词your book 放前放后均可,如果把your book 换成it 则只能放中间即put it away 意思都是把书收起来放好的意思

意思是游诸越而失游天下

熔化和凝固都是物态变化.
物质由一种状态变为另一种状态的过程称之为物态变化.
熔化：物质从固态变为液态的现象.（熔化过程需要吸热）
凝固：物质从液态变为固态的现象.（凝固过程需要放热）
晶体和非晶体
有固定的熔化温度的固体叫晶体,没有固定熔化温度的固体叫非晶体.
熔点：晶体熔化时的温度叫熔点.（非晶体没有熔点）
凝固点：晶体凝固时的温度叫凝固点.（非晶体没有凝固点）
晶体熔化的条件：1.温度达到熔点,2.持续吸收热量.
晶体凝固的条件：1.温度降低到凝固点,2.持续放出热量.

第二大题：CCACA.BCACA.BCACD.ABABB.
第三大题：ADABA.BAABC.
第四大题：1.Robots are very smart .2.They have their own computer brain .3.Robots .4.Yes ,they can .5.No ,they can't .
第五大题：1.will take 2.Yes ; they will 3.won't go 4.Will people 5.Where will; work
第一大题可以根据课本最后的单词表来填,第六大题挺简单的,根据3a就可以写.

“愿”是“希望”的意思,老师上课说过
“窃”就是“私下”的意思.

2x-320+4x=70 6x=390 x=65