某校队参加校办厂劳动,平均每人做76个零件,已知每个同学至少做72个,其中一个同学做了88个,如果不把这个同学做的算作在

lucy trains with the school team every friday
train在这时动词,训练的意思!

如果你们学校有的话,最后加进去,比如我们学校就有数学建模协会,暑假有一个月的集中培训时间,然后就是参加国赛.不需要掌握什么,经过学校的一个月培训,就完全可以参赛,而且获奖哈.主要的就是要有信心,要能够坚持.不要认为自己什么都不懂哈,有空的话我很乐意和你分享一下我的经验

i have been interested in basketball since i was fourteen years old, when i was 1.78 meters tall. i am one of our school team players now.

解题思路：（1）根据分数在[50，60）的频率为0.008×10，和由茎叶图知分数在[50，60）之间的频数为2，得到比赛总场数．再由分数在[80，90）之间的频数为25-2-7-10-2，做出频率，根据小长方形的高是频率比组距，得到结果．
（2）求出从得分不低于80分的比赛场次中任取两场的取法总数，及在抽取的两个场次中，至少有一场得分在[80，90）之间的取法数目，代入古典概型概率计算公式，可得答案．

（1）由茎叶图知，得分在[50，60）之间的频数为2，…（1分）
由频率分布直方图知，得分在[50，60）之间的频率为0.008×10=0.08，…（2分）
∴比赛场次共有[2/0.08]=25场．　　…（3分）
又∵得分在[80，90）之间的频数为25-2-7-10-2=4，…（4分）
∴频率分布直方图中[80，90）间的矩形的高为[4/25]÷10=0.016．…（6分）
（2）将[80，90）之间的4个得分编号为1，2，3，4，大于90分的2个得分编号为5，6，…（7分）
则在不低于80分的比赛场次中任取两场的基本事件为：
（1，2），（1，3），（1，4），（1，5），（1，6），
（2，3），（2，4），（2，5），（2，6），（3，4），
（3，5），（3，6），（4，5），（4，6），（5，6），共15个，…（9分）
其中，至少有一场得分在[80，90）之间的基本事件有14个，…（10分）
∴所求概率P=[14/15]．
故至少有一场得分在[80，90）之间的概率是[14/15]．…（12分）

点评：
本题考点： 古典概型及其概率计算公式；频率分布直方图．

考点点评： 本题考查的知识点是古典概型概率计算公式，其中熟练掌握利用古典概型概率计算公式求概率的步骤，是解答的关键．

We must select the best athletes for the shool team.
I feel it's difficult to convey my feeling by words.
What you say isn't relevant to what we are considering now.
he got down to his work after coming back from his vocation.
Fresh coffee is superior than instant coffee.
是百思英语上的么?似曾相识

I am always a very good basketball player in our school these years,the coach even believe I will be a superstar in the near future.But my parents don't cherish my basketball career,they think I should spend more time improving my study work than persuing basketball.Only in this way could I go into a better university.What's more,they even don't permit I to paticipate the training and competition as they have occupied most of my study time which make them very angry.But my bastketball is my live,I am font of it.And I just want to get some training to be a superstar.So what should I do?LiHong

Lily is going to attend the tennis training with her school team on Wednesday.

We are having football training with the school team.

他打算明天与我一起去逛商店
He is planning to go shopping with tomorrow.
他通常周六下午去上钢琴课
He ususlly goes to piano class on Saturday.
你不得不与校队一起进行网球练习吗?
Do you have to practice tennis with the school teem?
明天我将去听音乐会,你打算做什么?
Tomorrow I will go to a concert,what are you planning to do?
后天你能来我家吗?
Can you come to my house the day after tomorrow?
我一直到10点都有空.
I am available until 10 o'clock.

（1）设该校给旅行社的费用为y元,组队有x个人,由题意可列方程
　　y=360x (x≥30) ①
　　y=x[360-5(x-30)] (x>30 且 360-5(x-30)≥300,即30　　y=300x (x＞42) ③
　　所以,20×360=7200
　　（2）360×30=10800＜12400＜300×42=12600
　　所以302.　　. 设D（x,y）
　　因为A、B、C都在同一个反比例函数上,所以,三个点都在y=k/x（k为常数且k≠0）上,
　　带入方程可得 2(n+1）=(n-1)(n+4)=(-5-n)(n+5)

　　可得n=-3
　　所以三个点A（2,-2）B（-4,1）C（-2,2）
　　因为点A、B、C、D为顶点构成平行四边形

　　所以直线AB和直线CD斜率相等,且AB=CD
则x=4 y=-1
所以,D（4,-1）

That will get between our school and the success.

解题思路：每两个学校之间都要进行一场比赛，那么每个学校要比赛5场，需要6×5=30场，因为两个学校之间只赛一场，去掉重复计算的情况，实际上一共赛30÷2=15场，据此解答．

根据分析可得，每个学校要比赛：6-1=5（场）；
6×5÷2
=30÷2
=15（场）；
答：一共比赛15场．

点评：
本题考点： 乘法原理．

考点点评： 本题关键是理解每个学校都要和另外的5个学校之间进行一场比赛，注意去掉重复计算的情况，本题属于握手问题，它的计算方法是：比赛总场数=总队数×（总队数-1）÷2．

是不是现在回答晚了呀

B

It is tue that she will possibly enter into the school team.

As expected,I joined the school team because of the good performance in the tryout.Though I had to quit the team because of the conflict with my course schedule,I got to know that I would make it if I hoped to do something.

解题思路：根据题意列出方程组，然后求解．设所胜场数为x，平场数为y，负场数为z．

根据题意可得方程组

x+y+z＝11
2x+y＝14
x＝2z，
解得

x＝6
y＝2
z＝3，
∴我校队共平2场．
故本题答案为：2．

点评：
本题考点： 三元一次方程组的应用．

考点点评： 解此类题关键是根据题意列出三元一次方程再利用加减或代入消元法求解．

He swims very fast,so that he can stay in the school team

I hope I can play in the school team.

1.If you had been taller,you should have been a part of our school team.（虚拟语气,与过去相反.）
2.If I had known you bought so many gifts,I would have not bought them.（虚拟语气,与过去相反.）

3.The quality of our products is great.If they were to break down in a month ,we would exchange them freely.（虚拟语气,与未来相反.）

4.If you had had your medicine on time in the morning,you would not feel ache now.（混合虚拟语气）

你好!
What sports are you good at ?
I'm good at playing basketball and play for our school‘s basketball team.
be good at：擅长······

解题思路：出汗是排泄废物的一种方式，排泄能排除废物、调节体内水和无机盐的平衡、维持正常的生理功能，据此解答．

汗液的主要成分是水、无机盐、含氮的废物等，在参加训练后出了很多汗，会导致体内的无机盐等流失太多，体内渗透压增大，是因为血浓缩，导致的相对渗透压升高，由于出汗的同时也丧失钠盐，待补充液体后，机体必然导致低钠血症，所以要喝盐水感到很口渴，他最好饮用淡盐水．
故选：D

点评：
本题考点： 排泄的概念、途径和意义．

考点点评： 这部分内容在考试中时常出现，注意理解和掌握．

您好,本题可量化求解.
设乙队投球次数是100次,
那么有甲队投中次数是80次.
又因为甲队的命中率为80%,
则甲队一共投了也是100次,
有20次未中.
所以甲队没有中的次数是甲队的20%.
或者本题也可根据题意直接看到结果,因为甲队命中次数是乙队投球次数的80%,又甲队的命中率是80%,说明两队出手次数相同.
希望能帮到您,望采纳.

这是什么题啊……?_?

We are going to play soccer 【 with 】your【 school team.】

D

my life is colorful after school. im always go swimming and play football with my friends. And im in the school team.

Hey bob,thank you for inviting me to the game.i really want to join it with you,but my schedule has already been planned.on monday i need to prapare for my chemistry exam or i will be blamed for having failed the exam.from tuesday to friday i have to train with my football team.because we have a competition on sunday for which we have been praparing for a long time.on friday i have to finish my homework.it must be done on that day because i have no more free time this week!saturday is the day for cleaning,so i can't leave my mother alone to such heavy works.You see,although i want to join the game with you so much but i really don't have enough time.Next time,i promise,if you invite me again,i would play with you.i wish you could play well in the game. Yours Bo

有四个达标,总共有八人.是50%

C（3,7）*1+C（2,7）*2+C（1,7）*1
=35+21*2+7
=84
首先一个班选一个人,只一种方案,还剩3个人,7个班排
7个班取3个班,每个班一名的排法有C（3,7）*1种
7个班取2个班,一个班一名另一个班两名的排法有C（2,7）*2
7个班取1个班,一个班三名有C（1,7）*1