《教与学》新版初二上数学7.4（二）

期末学业评价A CBDACDBCADBCBDCABCDBAAADB

七年级英语下册《教与学》Review of units 7-12和期末学业评价A,急用!人教版的啊 cbcbcfb cf yiANJRTVKJVBY 期末学业

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设第一个人的年龄为x,第二个人的年龄为y.则有方程组（1）y-(x-y)=4 (2) x+(x+y)61解方程组得：x=23 y=42答：第一个人42岁，第二个人23岁。

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Unit 3 Why do you like koala bears?
一．重点词组
eat grass eat leaves be quiet very shy very smart very cute
play with her friends kind of South Africa other animals
at night in the day every day during the day
二.交际用语
Why do you like pandas?Because they’re very clever.
Why does he like koalas?Because they’re kind of interesting.
Where are lions from?They are from South Africa.
What other animals do you like?I like dogs,too.Why?Because they’re friendly and clever.
Molly likes to play with her friends and eat grass.
She’s very shy.7.He is from Australia.
8．He sleeps during the day,but at night he gets up and eats leaves.
9．He usually sleeps and relaxes 20 hours every day.
10．Let’s see the pandas first.11．They’re kind of interesting.
12．What other animals do you like?13．Why do you want to see the lions?
三.重点难点释义
1、kind of 有点,稍微 Koala bears are kind of shy.考拉有点害羞.
kind 还有“种类”的意思
如：各种各样的 all kinds of We have all kinds of beautiful flowers in our school.
2、China n.中国 Africa n.非洲
China 和Africa都是专有名词,首字母都应该大写,而且和介词in连用.
There are many kinds of tigers in China.There are many kinds of scary animals in Africa.
3、friendly adj.友好的,和蔼可亲的
它是名词friend的形容词形式,常常和be动词连用,be friendly.
The people in Chengdu are very friendly.
4、with prep.跟,同,和…在一起
I usually play chess with my father.
注意区别与and的用法,and通常用于连接主语或宾语,连接主语时,
如果有I,I通常放在 and 之后,如：
My father and I usually play chess together.
Play with “和…一起玩耍”“玩…”
I often play with my pet dog.Don’t play with water!
5、day和night 是一对反义词,day 表示白天或一天,night表示夜或夜晚.
通常说in the day,during the day,at night.
Koala bears often sleep during the day and eat leaves at night.
6、leaf n.叶子
复数形式为：leaves,类似的变化还有：wife—wives,wolf—wolves,
knife—knives,scarf---scarfs(scarves)等.
7、hour n.小时；点钟 hour前边通常加上冠词an 表示“一个小时”,即：an hour.
There are 24 hours in a day and 60minutes in an hour.
8、be from 来自… be from = come from
Pandas are from China.= Pandas come form China.
9、meat n.（食用的）肉,为不可数名词,表示“许多”时,使用much来修饰,即：much meat He eats much meat every day.
10、grass n.草,为不可数名词,表示“许多”时,使用much来修饰,即：much grass.
There is much grass on the playground.
四.语法知识
特殊疑问句通常以“what”、“who”、“which”、“when”、“where”、“how”、“how old”、“how many”等开头,对某一具体问题进行提问.特殊疑问句的基本构成有两种情况：1.疑问句+一般疑问句结构.这是最常见的情况.例如：What’s your grandfather’s telephone number?你爷爷的电话号码是多少?Who is that boy with big eyes?那个大眼睛的男孩是谁?Which season do you like best?你最喜欢哪个季节?When is he going to play the piano?他什么时候弹钢琴?Where does he live?他住在哪儿?How are you?How old are you?你多大了?How many brothers and sisters do you have?你有几个兄弟姐妹?2.疑问句+陈述句结构.这时疑问词作主语或修饰主语.例如：Who is on duty today?今天谁值日?Which man is your teacher?哪位男士是你的老师?我们学过的What/How about+名词/代词+其他?也是特殊疑问句,它是一种省略结构.
例如：
I like English.What/How about you?我喜欢英语.你呢?
What about playing basketball?打篮球怎么样?

同旁内角互补,两直线平行,[过点E做平行与AB,CD的一条辅助线}

一是说:诸葛亮神机妙算;二是说周瑜非常佩服诸葛亮.其中第二层意思与课文第一句话相呼应.我是老师.准没错!

我们不能不遵守交通规则
这件事我不会不向你说清楚.
插柳之恩,我不会不记住的

W有用=Gh=6*10^4N*500m=3*10^7J;
W额外=6*10^4*0.1N*2500m=1.5*10^7J;
W总=W有用+W额外=4.5*10^7J;
P总=W总/t=4.5*10^7J/500S=9*10^4W;
机械效率=W有用/W总*100%=66.7%
这是100%正确的答案!

do like ice-cream

绝对正确
单元自测啊
DBCAC ACCAC BCBDA CDADA BCDAC BDBCA FTTTF Wat's doing is putting are talking windy rainy snowy
我只能说这些全对,其他不能保证了

证：在AB上截取AM=AD,连接MD∴⊿AMD是等腰直角三角形∴∠MDA=∠DMA=45º∵∠A=90°,AB=AC∴⊿ABC是等腰直角三角形∴∠CBA=45º∵BD平分∠ABC∴∠DBA=22.5º∴∠MDB=90º-∠ABD-∠ADM=22.5º∴∠ABD=∠MDB∴BM=DM∵AB=AC,AM =AD∴BM=CD∵∠A=∠E=90º,∠BDA=∠CDE∴∠ABD=∠ECD作MN⊥BD于N∴BN=DN【等腰三角形底边的高即中垂线】即BN=½BD∵∠MBN=∠ECD,∠MNB=∠DEC,BM=CD∴⊿MBN≌⊿ECD（AAS）∴CE=BN∴CE=½BD

你在上海书城都能买到的 可以去看看 买不到 可以来我们华东师大出版社买的

32.(1)答:1力能改变物体的运动状态;2物体间力的作用是相互的
(2)答:化学能,机械能,热能
(3)答:物体间力的作用是相互的:喷出的蒸气对车子产生一个作用力,相反车子对它也有向前的推力.
34.G=mg=2kg*10N/kg=20N
因为F=f+G
所以f=F-G
=32N-20N
=12N

A,B,C,A,D,C,A,B,C,D,A,C,D,B,A
也不一定对啊 你应该自己尝试这去做

凸透镜成像：
(1)物体在二倍焦距以外(u>2f),成倒立、缩小的实像(像距：f

额~你这网上肯定搜不到的,就算有人有,那也是书版的,叫他们怎么发给你,难不成一个字一个字打出来,哎,我就有这答案,不过不晓得怎么发

可怜的学生.
同步训练
sectionA
一.1.doing 2.riding 3.watching 4.raining 5.getting 6.running 7.writing 8.snowing
二.1.snowy2.cioudy3.rainy4.windy5.sunny6.foggy
三.1.drawing2.is reading a book 3.is singing 4.iscooking 5.is jumping
sectionB
一.1.weather 2.pertty 3.watching 4.cold 5.humid 6.warm
二.1.going 2.rainy 3.raining 4.ciouds 5.windy 6.isn't 7.doesn't snow,walk
三.1.What's,like 2.having a good time 3.What is,doing 4.It isn't 5Are there lots of people on vacation here?
四.1.joining 2.sunny 3.on 4.taking 5.lying 6.piaying 7.surprised 8.heat 9.interesing 10.really
单元自测
一.DBCAC ACCAC BCBDA
二.ABCDB CCABD
三.BDBCA BDCCA
四.1What's,doing 2.is putting 3.are taiking 4.windy rainy 5.snowy
五.1.Animais 2.friendly 3.doctor 4.hospital 5.surprised 6.lying 7.humid 8.scarfs 9.Pretty 10.group
六.1.having 2.am visiting 3.live 4.watch 5.reading 6.is calling 7.is cooking 8.heip 9.are 10.doing
七.1.What's,like 2.How going 3.What's,doing 4.Does run 5.How's
八.Mark,Trent,May,Henry

自己做的
单元自测
DEABC
CBBA
CDDAD
CACBD
ACADD
BCDAC
DBCBC
CBCCB
5：书上有的
6：busy
on
shopping
vegetbles
am visiting
for
am cleaning
after
washing
am going
7:idea
going
yes
going
where
what time
in
good
see