第七页 神奇的标点符号下面几组话,用不同的标点法,就会有不同的意思,请你试试看只有一张票给小冬的不是给小夏的小夏一定要看

应该是一个加权平均方差的式子.r拔-平均是样本加权平均值.Ni就是权重,可以表示每个样本ri所占的比重.加权之后的方差针对特定的研究对象会更具科学性.
一般情况,r=平均值,则∑[（ri-r拔）^2]/n就是平时的方差.

3.14×2×1.2=7.536 采纳我呗 第78页3题在学校的运动会上,四（1）班的同学取得了优异的成绩.为此,班级家长委员会奖励350元给他们购买奖品.

来个图

1.96乘4分之3=72(页）
2.600乘25分之12=268（千克） 75吨=75000（千克）75000乘25分之12=36000（千克）
3.100乘20分之1=5（元）
4.3分之2乘4分之3=2分之1 1米=10分米 10乘2分之1=5分米 5分米=0.5米

中间是原子核,核内是质子和中子,且前20号元素原子中,稳定原子（不说不稳定的同位素）的质子与中子等数量,外围是电子,电子数和质子数相等
核电荷数=质子数=核外电子数＝原子序数
质子数+中子数==相对原子质量
研究质子数,中子数,电子数,上面的公式是需要了解的

一、测量 1 毫米、分米的认识 2 千米的认识 3 吨的认识 二、万以内的加法和减法 1 加法 2 减法 3 加减法的验算 4 整理和复习三、 四边形 1 四边形 2 平行四边形 3 周长 4 估计四、有余数的除法　1　有余数的除法的意义和计算　2　解决问题五、时、分、秒　1　秒的认识　2　时间的计算填一填、说一说自我小测试（一）自我小测试（二）六、多位数乘一位数　1　口算乘法　2　笔算乘法　3　...

Mom：Come on,Jack!康姆 昂 夹克
Jack：Oh,no!Where's my bag?哦 弄 味儿 买 白鸽
Mom：Hmm……is it on your desk?诶子 诶特 昂 幼儿 戴斯科
Jack：No,And it's not under the chair.弄 俺的 诶次 闹特 昂的 热 柴窑
Mom：0h!It's on the sofa.哦 诶次 昂 热 艘发
Jack：Thank you,Mom.Err…where's the map?散客 有 麻木 味儿 热 迈普
Mom：l think it'sin your grandparents'room.唉 新课 诶人特 幼儿 管软的怕次 荣木
Jack：Yes,it's on their bed !And my hat?噎死 诶特 昂 人二 白的 俺的 买 海特
Mom：It's on your head诶次 昂 幼儿 喊得
Jack：Oh!yeah!Haha!哦 也 哈哈
希望能帮到你〜＞_＜

求题目

建议你直接把题目发上来
设这个小数是x.
10x-x=9.9
解得,x=1.1
这个小数是1.1

是哪一题

How to connet the mobilephone and the computer?
She sits on the bed overnight because she can't sleep.
We have to pay attention in class.
She reviews on this body cream.
We can get a lot of knowledge by reading.
I have the ability to answer all the questions.
Teachers like the active students.
He solves the problem wisely.

3A（1）已
（2）白菜
（3）果汁
（4）汤
（5）饺子
3B（1）甜点
（2）特价
（3）香蕉
（4）苹果
（5）冰淇淋
（6）中
（7）橙汁
（8）绿茶
你学会更好地法力
我们已经了解到第十单元 - ||

去括号：3X+6-2=X,
合并得：3X+4=X
移项得：3X-X=-4
合并得：2X=-4
系数化1：X=-2.

请把题发上来，才能帮上你的忙！

3. 105 997
4. 241
5. 1 和2 8 和9
6.
7. 21 38
8. 15=13+2
时间不够了 你能给我一点时间吗

数学什么书?

12

1.一门父子三词客；千古文章四大家
三苏：苏洵,苏轼,苏辙
2.豪气压群雄,能使力士脱靴,贵妃捧砚；仙才媲众美,不让参军俊逸,开府清新.
李白
3.玉帐深宵悲骏马 楚歌四面促红妆 项羽
4.四面湖山归眼底 万家忧乐到心头 范仲淹

（1-1/20×8-1/30×3）÷（1/20+1/30）
=（1-2/5-1/10）÷1/12
=1/2÷1/12
=6天
答：剩下的甲乙合作还需6天

不知道

P6；1B 2A 3C 4E 5D 广厦福宁上 赔9.8亿 ,开口岸 ,除炮台,禁反帝广州外语音像出版社八年级上册寒假作业答案 文科和理科 p1页的第一题 .

双击页脚在插入页码里面设置,有多种编号选择,现在你要的开始编号打上勾.在第七页双击页脚-选择数字123字样-选择本页之后开始编码ok了.

want to go ___beijing__.It is_beautful___there.
I am going to go there with_my brkther___.We are going to go there by__train__.
I'm going to __travel_______.
I'm going to take _my___camerca___with me.It will be fun.
We will have a great trip.

圆=πd或2πr,就是3.14×直径或3.14×半径×2

我问了一下俺们的英语老师
Please choose (right) pages:
page one
page two
page three
page four
page five
page six
page seven
previous page
next page
当然也可以用阿拉伯数字,例：page 1
翻页可以用turn to.

急求“教育科学出版社2013版七年级英语同步听力上mp3”_百度知道
打字不易,

I am sorry you are having trouble in making friends.However,the situation is easy to change if you take my advice.Here are some tips to help you:
First,why not find a recent hot topic to start a conversation with the person you want to make friends with?For example,you may talk about the news of Yao Ming’s retirement.You may share your ideas with others.If you do this,you may feel much close with your classmates.
Secondly,you should play an active role in class work to show your good points and personality.So your classmates may know you better and like to be with you.
Finally,don’t worry about it now.You are only a new senior high student.You and your classmates will know each other better and become friends in school learning and activities.Be confident in yourself.You will have a lot of good friends.

1 A C 2的对与错是正确的,错误的3ji ^êku'ai bi'an曹安4xvn - 鲁迅U - 武v - YV和殿 - DIAN

你把第七页的题目拍下来,然后再发过来,我看了再给你答案.

马和驴不同之处:马与驴的鬃毛明显不同,以及驴耳上部是不尖的,而马耳是尖尖的；马嘴较于驴嘴,是更长的;还有马的毛色比较光滑、发亮,驴的则看上去不如马.（由于时间紧迫,暂告诉你这些,还是要自己动脑啊!应该挺简单的吧!）

October 十月 cousin 堂兄弟姐妹 Stamp邮票envelope信封 sugar 糖 Vegetables蔬菜 sunner夏天

看数学书

发张照片吧，我没带书

1.B
2.C
3.A.D和E
4.A和D
1.D
2.C
3.B
4.G
5.A
是不是这些题目?

要有题目

抄答案办呢习吧抄作业没处悔现抄作业掌握知识考试做算考试抄别能抄辈做做相信问爸爸妈妈

你把题目写出来吧~

把一根底面周长是25.12cm,高50cm的圆柱体木料,锯成高是25cm的两段圆柱体木料,表面积比原来增加100.48cm²,原来这根木料的表面积是多少平方厘米?

这个问题我刚回答过.、For this reason,I have always felt it a blessing if a friend comes to console me in my sadness,cheer me up in my low spirits,or heartedly share with me my happiness.因此,我常期待在我悲伤的时候,朋友能够过来安慰我,让我低落的精神好起来,或者与我分享我的快乐.
2、Yet,they,too,have mercilessly accused false friendship,for there are always some mean characters who approach you and act as dear friends when you are wealthy or influential,but desert or even betray you the instant you come down in the world or are entrapped by unfortunate things.
3、 The old saying "A friend in need is a friend indeed" has become the teaching and standard for true friends.俗话说“患难朋友才是真正的朋友”.
4、 So long as a person has a heart of gold,being warm-hearted,selfless,honest,open-minded,but not brutal,cold,shortsighted nor narrow~minded,I am willing to make friends with him or her,give my due support and help,and remain faithful to him or her all my life.
As a human being,one can hardly do without a friend,for life without friends will be a lonely voyage in the vast dark sea or one in the barren desert.Traly,a friend gives out light and warmth like a lamp.For this reason,I have always felt it a blessing if a friend comes to console me in my sadness,cheer me up in my low spirits,or heartedly share with me my happiness.It is wonderful,too,to feel that someone is standing by me and ready to provide help and encouragement in my pursuit of a noble and glorious cause.
For millions of years,people have heaped beautiful verses and essays upon friendship.Yet,they,too,have mercilessly accused false friendship,for there are always some mean characters who approach you and act as dear friends when you are wealthy or influential,but desert or even betray you the instant you come down in the world or are entrapped by unfortunate things.Therefore,people all attach great importance to the recognition of true friendship.And a faithful friend is considered even more precious than a priceless pearl or a precious stone.The old saying "A friend in need is a friend indeed" has become the teaching and standard for true friends.
Still,it is natural that different people observe different principles in making friends.Some view it important to make friends with whom they may share similar interests or hobbies with.Others are liable to befriend VIPs so as to gain some favors or privileges.And I am of those who think very little of similarity or position or power.So long as a person has a heart of gold,being warm-hearted,selfless,honest,open-minded,but not brutal,cold,shortsighted nor narrow~minded,I am willing to make friends with him or her,give my due support and help,and remain faithful to him or her all my life

有图吗

1、直接写出得数.
3.14×2²＝ 12.56÷2∏（pai）＝ 5×3.14＝ 3.14×3²＝
2.8÷0.4＝ 1.5×1.5＝ 0.5×0.5＝ 12.56÷3.14＝
2、 把一根底面周长是25.12cm,高50cm的圆柱体木料,锯成高是25cm的两段圆柱体木料,表面积比原来增加100.48cm²,原来这根木料的表面积是多少平方厘米?
3、 一个圆柱体油桶,底面半径是0.3m,高1m.做两个这样的油桶5m²铁片够不够?
4、一个零件由一个圆柱和一个长方形组成（如右图）,长方体的长、宽、高分别是5cm、4cm和3cm；圆柱的高是4.5cm,直径是2.4cm.如果要给这个零件表面涂上油漆,涂漆面积是多少平方厘米?（得数保留整数）
图形摆放：圆柱在长方体上,圆柱的一个底面和长方体底面一小部分重合 也就是有两个圆柱底面不用求
5、一台压路机的滚筒直径为1.5m,宽1.8m,每分钟转动20周,这台压路机每分钟压过的路面是多少平方米?
跳一跳
一个圆柱的侧面积是188.4dm²,高是15dm.这个圆柱的表面积是多少平方分米?
呼呼!累死偶也!第四题图形摆放不太懂解释 lz看得懂吧?
纯手打,,勿抄袭!

一半的油：11-6.25=4.75KG
一桶油：4.75*2=9.5KG
桶11-9.5=1.5KG

1．下列交换加数位置的变形计算中6正确的是【　　　】A．－3＋4－3＝－3＋3－4　　　　　　　　　　　　　B　－3＋4－3＝4＋3－3C．6＆＃47；7＋1．5－1＆＃47；7＝6＆＃47；7－1＆＃47；7＋1．5　　　　　　　　　　　　　　　　D　．6＆＃47；7＋1．5－1＆＃47；7＝6＆＃47；7－1＆＃47；7－1．5842．－11　　　－　7　　　＋　6　　　　　　　　7．2＋［－1．8］－［0．8］　　　　3　．　　－1＆＃47；3　＋　3＆＃47；4　－　1＆＃47；6　－　1＆＃47；2

题目呢?

你得给出试题

3.-3小于2 -5小于-4 0大于-7
-0.5大于-1.5 6大于-6 0小于8

你确定是人教版?如果是,那么此题无解,因为我仔细看过了,根本就不存在你说的那个题

半周不就是360/2=180度么
10S方向改变就是360x10 /(2x60)=30度
示意图自己画好了