（2）李海的父亲购进了一批春兰空调,除按进价的百分之17上缴税费为,为保证有百分子20的利润率,市场售价

（89.5×2+94）÷3=91
望采纳,谢谢

初期成本：
甲：a/（1+20%）
乙：a/ (1-20%)
合计投入：a/（1+20%）+a/ (1-20%)
合计回报：a+a=2a
合计盈亏：合计回报-合计投入=2a
-（a/（1+20%）+a/ (1-20%)）=-a/12
因为a大于0,所以本次投资总计是亏损的.

…

1困惑 2疑惑
困惑：：感到疑难,不知所措.
疑惑：迷惑,不理解
同 都有不明白的意思
异 困惑不知道该怎么办
疑惑是不相信

As soon as on hearing the news,a farmer(who is) called Lihai paddled his own boat to the affected areas

Dear Peter:
Thanks for your letter.I'm glad to hear from you.Now,I would like to introduce my family to you.There are five people in my family:my grandparents,my parents and I.We live on the sixth floor of an apartment.There are four bedrooms,two study rooms,a sitting room with a balcony and a dinning room.My bedroom is big and quiet.I hope you and I can live in the same room,so we can chat and listen to some music together.Our family are all looking forward for your coming.You will have a good time with us.
Best wishes!
yours:
Lihai.

设甲股票成本为X1,乙股票成本为X2,其盈利（或亏损）为：
X1*20%-X2*20%,所以看其持有股票价值的大小,如你所说,卖价相同,那就比较买价和买入数量.成本（X）=买价*数量.X1大就是盈利,X1小就是亏损

Li Hai is my good friend.He has many hobbise.He used to be a filmnik .He went to the cinema at least twice a week .Sometimes ,he rented VCD at home ,jiangwen is the most liked actor by him ,but now he has a new hobby ,he likes collecting stamps ,he thinkes it is very funny ,and he can learn many from stamps ,such as about persons ,places ,history and knowledge ,and some old stamps is very valuable .Last Friday is his birthday ,he got a lot of stamps from his friends ,he felt very happy .

Do you know what dish is the most popular in the cold winter in China? I know it’s hot pot. Hot pot is a Chinese tasteful folk dish. No matter in the north or in the south, people like hot pot very mu...

李海是一名中学生,去年他成了一名志愿者.Li Hai is a middle school student, last year he became a volunteer. 他英语学得很好,课后在英语俱乐部经常帮助英语差的同学. He learned English very well, he always help other students who are not good at english in club after class. 在他的帮助下,这些同学取得很大的进步. With his help, these students made great progress.
他常说：“志愿者行动是伟大的,我不仅帮助了别人,而且自己也很快乐.” He often says: "Being a volunteer that's a great experience, I can help others at the same time make me feel happy."
在他的影响下,许多同学成了志愿者,他们帮助做了很多有益的事. From his story, many students have became volunteers, they do a lot meaningful things.

（1）李海可以在老师讲解完后，委婉的提出自己的想法，或课下与老师进行交流；还可以采取写信的方式或打电话的方式。
（2）“吾爱吾师，吾尤爱真理”。老师也有出错的时候。合理地给老师提出意见和建议，也是对老师的一种爱。只不过，我们要注意表达方式，不要让我们的爱使老师难堪。
（3）材料二中吴老师的做法不对。如果是我，我会通过行政或法律手段解决这件事，老师应当尊重未成年人的人格尊严，不得对学生实施体罚。自己上课捣乱是不对的，应向老师承认错误。

1.王林认识,李海不认识.
2.--王林认识李海?
--不认识.
3.--王林认识李海不?
--认识
4.--王林?
--认识!
--李海?
--不认识...