点金教练六年级下册数学第六单元第六大题第3小题

我的答案不一定是对的哦.但是还是可以借鉴的.我按顺序给你发,你要给我满意哦.
BAACD DCDDD CBBCAAADAD BDCAA CCBDA BDDBA BCBDB CADCC CDBBC CABBB CDDBB CCAAA CACBA CDDDB DCACB ADDBA DCCCA 记着给满意.,.

f(x）=（x-1)×根号下1-x分之1+x =根号下((1-x)/(1+x) *(x-1)^2） =根号下((1+x)*(1-x) ） =根号下((1-x^2) ）

不好意思没有的,但你可以把题发过来,我帮你做一下,毕竟我都上高中了,我是专门学的语文

亲,我们没有
课本的,你直接发问题我们才能给你解答

Unit 12 section A
一．A)1.has 2.are watching 3.playing 4.did 5.bought (B) 6.fight 7.outside 8.classroom 9.else 10.hall
二． CBDCD
三．1Can eat 2.Come to 3.No don’t 4.Don’t listen 5.other things
四 1.thoes rules 2.sports shoes 3.arrive late for 4.in the dining hall 5.at classroom outside
五．CAFDE
Section B
一．（A）1.on 2.to 3.from to 4.at on 5.in by at (B) 6.children 7.talking 8.any 9.her 10.speaking
二．1~5.DCABC 10.CDADD
三．1.Do have to 2.Don’t run 3.Can play 4.have fun 5.can’t have to
四．1.Do you usually help your mom make dinner?
2.Don’t talk loudly in the classrooms!
3.I have to go to bed by 10 o’clock.
4.Do have to go to the Children’s Palase to learn the paino?
5.Can you meet friends at night?
五．1~5.CABDA 10CBDCA
六．Welcome to School Library
2.Don’t take your food into the libray or eat in here .
3.它们会使书本潮湿.
4.Three weeks
5.If you lost them,you have to play for them-------either pay money for them or buy the some books.
期中综合练习
1.across 2.hospital 3.magazines 4.camera 5.snows
二．1.us 2.friendly 3.begining 4.Children’s 5.surprised
三．1~5 BBCCC 10 CDDBA 11~15.DDCCC
四．1.aren’t any 2.Does have 3.What does 4.Why do 5.What does 6.What’s doing 7.is doing 8.does do 9.What’s like 10.having a good time
五.1.What are you doing 2.Do you have a pen pal 3.Where does she from 4.Are there any famous animals 5.What’s the weather in Australia
六.DBCAC BACCD
七．BCBAC 6.David is 12 years old 7.Beause it can make him get up early to take exercise 8.Three 9.香水10.On the table
期末综合练习（一）
1． height 2.dinner 3.pratice 4.Geography 5.loudly
2． 1.colorful 2.writes 3.potato4.wearing 5.talking
3． BCCCD ACBAD CBBDC
4． 1.Were any 2.didn’t play 3.doesn’t have 4.Don’t arrive 5.didn’t do 6.What would 7.Who does 8.How like 9.would like 10.Don’t take
5． GCFED
6． DBADC BCBCA
7． DBCBA
8． 1.He is a reporter.2.Because he thinks they are interesting 3.Sports News 4.He thinks the coolest thing is the sungiasses 5.He doesn’t like game shows or wallets.
期末综合练习（二）
一．1.popular 2.expensive 3.agree 4.garden 5.build
二． 1.cloudy 2.went 3.singer 4.washed 5.us
三．BDADC BDACC CCBBD
四．1.Does have 2.didn’t went 3.doesn’t or 4.Were any 5.he didn’t 6.Why does 7.How were 8.Where does 9.How was 10.to me
五．1.goes shopping 2.wrote to 3.help me 4.for joining 5.arrived late
六．1.Where does he come from 2.What does he look like 3.what does he like 4.Do you want to meet him 5.What is the weather in Toronto
七．BBABC DABBA
八．DCBDA BCDAB
1.They lived in a big city 2.Because it was a quiet and clean plase 3.No,it wasn’t 4.Everbody knows everybody ,People often come and see him and he often go and see them.5.Yes,he did

fdsvfds

因为AE垂直于DE,
∴角AEB+∠DEC=90°
又∵AB垂直于BE,DC垂直于EC
∴∠B=∠C=90°
∵∠A+∠AEB=90°
∠D+∠DEC=90°
∴∠A=∠DEC,∠D=∠AEB
证到三角形全等,就有AB=EC,BE=DC
就会得到BC=AB+CD
我的过程有点烦,但大致的意思就这样,自己可以在简化一下

发图

因为王安石是根据物理学的客观现实来说这句话的.而王籍的观点 是运用黑格尔的诡辩哲学或人的感情用事的心理感受而非现代科学的观点来看问题的.
因为事实证明,没有声音总要比有声音会更宁静些.而王籍的观点却正好相反,所以王安石的观点是符合现代逻辑和科学的.
当然,如果王籍的观点改为,鸟鸣山更美,或更愉悦等,或更充满灵气等,就没有问题,但如果说一个山谷里有声音要比没有声音更幽静、更宁静就让人费解了.
答案里采用的所谓“对立统一”,只适用于用来玩弄诡辩文字游戏,但却不可用来指导理性思维和自然科学和技术的研究,更不能用来解决现实生活中的实际问题.所以这个答案本身就是有问题的

对的.
鸟鸣突出山幽.就好比因爱生恨恨更深,又如吃得苦中苦后才能领会到成功的幸福.
身体病好了才知道健康的重要性.
饿了三天才知道大馒头真好吃.

第一题：
没饮酒时
11m/s的车速刹车距离为
S=0.7*11+0.08*11^2=17.38米(正常刹车距离)
17m/s的车速刹车距离为：
0.7*17+0.08*17^2=35.02米(正常刹车距离)
饮酒后：
17m/s的车速刹车距离为：46m
得饮酒后多出反应时间为(46-35.02)/17=0.648s
所以饮酒后11m/s刹车距离为
S1=(0.7+0.648)*11+0.08*11^2=23.43米
所以多出刹车距离为：
S1-S=6.05米.
第二题：
显然当速度为17m/s且距离为40m时要求的反应时间最短～
此时进行讨论：
设反应时间为T,那么有：
S=(T+0.7)*17+0.08*17^2

21页第一大题DBBBAAACDD.第二大题,第一小题26,4,-3.75,-13,-5,-9.第二小题-2第三小题28,28

1羊＝2/3猪
1只羊+2头猪+1头牛＝2/3猪+2猪+3猪＝17/3猪＝340＝340*17/3＝20*3＝60kg
1只羊＝2/3*60＝40kg
1头牛＝60*3＝180kg

把74分解为（70+4）就变为（70+4）*25+16了.70*25+4*25+16=1866

你用电池自制个电解槽,一边插碳棒（可以拆电池里那根用）,一边插根铜棒,接上电池,铜棒上就会吸出银,混在里面的金由于不会反应就会沉淀下来,你手收集下就ok了,哪里不清楚你上百度看下电解常识就行啦,希望对你有帮助!

表面积增加了56.52平方厘米,所以底面积为56.52/2=28.26,半径是√28.26/3.14= 3
原来表面积是3.14*3*2*120+28.26*2=2317.32

你可以去买本教材全解 那上面有

没有卖的,只有学校有. （好像）