滨江公园有一条近似于圆形的湖面,直径400米.沿湖的一周每隔4米种一棵柳树,一共要种几棵?

滨江公园的占地面积大约是5(平方公里).

It's cold today,we went to autumn outgoing early .We came to the binjiang park first ,then our group hired a car which can hold three of us .But after we renting it we feel regret,because we can't control it,so only two of us ride it ,last one was running
now when think about it we felt very silly,actually we can rent another type of the bike,since the weather was too cold,after sitting in cafes to gettother.Afternoon we went on a visit to the huangpu river,sitting in the boat we felt warm and took lots of pictures.Oerall,it is a very happy day...

滨江公园新设了由两个英国人开发的游乐项目.我们一定要紧密团结,互相帮助.

病句的意思是有两个英国建设了游乐项目,当然是错的,应改为“滨江公园新设了两个由英国建设的游乐项目”,这样就不会有歧义

(1)设买A苗X棵,则B苗900-X
根据题意可知：80X+（900-X)100《82000
则X》400
故A苗不少于400棵
（2）设A苗为X,则B苗900-X,而费用函数为f(x)
则(92%X+（900-X)98%)/900》94%（1）
F（X）=90000-20X（2）
通过（1）可知X《600
此时F(x)最小为78000
所以购买A苗600,B苗300

张老师+38位同学一共39人,全部买团体票：4*190=760 买3张团体票再买9张个人票 3*190+9*20=570+180=750

400*3.14/4=314颗

The strand river's park depends on the river and then sets up,is outside pool of the proper chang .The spring arrived,strand river the park fresh flowers bloom,leading to come many visitors to halt the foot to appreciate.The summer arrived,the green tree becomes the shady ,the visitors do exercise to keep fit here,the prospects that a parties thriving.The autumn arrived,the laurel blossom floats the joss-stick,is a season for have a bumper harvest.The winter arrived,the snowflake floats the dance,divide outside flirtatious.The strand river's park is the proper 昌 person's good place of the leisure.

春游与滨江花园交换
公园里加入有字
红字去掉
缺少主语，改为我情不自禁地说
心慌意乱错了

1、t=s/v=2km/(8km／h)=1/4h=15min
2、m=pV=1.0×103kg／m3*6 m3=6000kg
3、W=Fs=6000N*2000m=1.2×10ˆ7J
4、动能减小,重力势能减小,所以机械能减小

加上李老师总共44人,大船2条,坐12个人；小船8条,坐32个人.
总计10条船,44个人.