王雷是我的一位好朋友wang lei is a friends _____ _____

放弃未必不是错的

Dear Wang Ming,
I’m glad to receive your letter.I’m happy that you’re going to visit your American friend.When you go to an American home,you should buy a small gift,such as some flowers or some fruits.Could you get there on time?If you are late,the owners won’t be happy.When you eat,you should say some good words to the dishes.You shouldn’t stay too long.Would you mind my talking about these things?
Yours,
Wang Lei

1. 设标价为x元, x*80% = 188,x = 235（元）
2. 设第一个数x,则另一个数为8-x, x+3 = 8-x-3, 解得 x = 1,另一数为7
3. 设每小时行x千米,则有x*(9.5-8) = (10-8)*9 解得x = 12千米
4. 设孙子赢了x盘,则爷爷赢了8-x盘, 3x = 8-x 解得x = 2, 爷爷6盘
5. 设麦田为x, x*(1-0.25-(1-0.25)*0.2) = 6 解得 x = 10
6. 设其总寿命为x, 1/6x + 1/12x + 1/7x + 5 +1/2x + 4 = x
解得 x = 84
结婚时年龄 = 1/6x + 1/12x + 1/7x = 33
去世时 84

（82x9＋4）÷7＝106

与朋友之,言而有信

1、188/0.8=235
2、5405/(1+0.7%*3)=5000
3、设第一个数x,第二个数y
x+3=y-3
x+y=100
x=53 y=47
4、题目有问题
5、设：爷爷赢了x局.
x=(8-x)*3
x=6
爷爷6孙子2

如果设标价为x，可以得出方程0.8x=188，所以x=188除以0.8，得出x等于235，所以标价是235元。

冬情 我觉得比较好,内容是关于人心的真善美给人带来的喜悦与幸福,就像雪中送炭这个温情的词给人带来的无限温暖

Dear ...:
Three boxes of each type have been sent to you earlier. Reciever: Wang Lei.
Please confirm whether they have been received by your side.
If yes, I will send another box for each type.

The coat is too small for Wang Lei to wear.
The coat is so small that Wang Lei can't wear it.
The coat is not big enough for Wang Lei to wear.
希望能帮到你,祝你开心.

　　Dear Jenny,
How are you getting along these days? I hope everything is all right. But I am upset these days
because of my parents. I think they take care too much about me and too overvalue my grades. I
have to tell them my every exam and my grades. If I do well, they are happy. If I don’t, they
would be every sad and nervous, especially my mother. My mother even makes a detailed plan for
my future. In her plan, I will go the best senior school of my city and then go to a top
university of our country. She wants me to be a civil servant in the future, because this job is
steady and well-paid. But I don’t like it; I want to be a journalist. I feel so upset about her
plan. I told them my feelings before, but they never listened to me and said what they doing are
good for me. What should I do?

Wang Lei is a middle school student, he is 13 years old, his family has three people, he and his parents, who live in Beijing, the family from the south, but north of the food they like, they like to eat noodles, Wang Lei swim , will be playing football in his home next to a playground are every Saturday afternoon, Wang Lei and his classmates will be there to play.
Translated into English! ! !

Mrs zhang is an English teacther of our class. She give us the frist class today.
Before the class, the classmates are curious about what the new teacher look like.
then we all know,the new teather is very beautiful ,who is tall and thin,dressed a red skirt. At last,she introduce herself by English,and ask us to do it like her.We are very happy.

A

冬绪 冬天人，动物，天地的情绪和情感，有欢笑有泪水有失意时的无可奈何，有失落是的胡思乱想……

一
As time goes by, man is making the earth sick. People cut down too many trees and throw rubbish away here and there. Many factories pour waste water into rivers and lakes. As a result, a lot of rich land has changed into desert, leaving only sand. Many rivers and lakes are dead now. The air is becoming dirtier and dirtier. The temperature on the earth becomes higher and higher. Many people now are in bad health. I think everyone is supposed to reduce the waste. Recycling can not only protect the environment but also save money. We’d better not buy bottles or boxes which people can use only once. If we are greener people, our world will become more and more beautiful
.二
Hello, everyone. As we know, Many Iraqis become homeless people because of the war. Some of them are children. They used to be rich but now they lost warm houses and have no enough food to eat. The children have no chance to go to school. The hard living conditions made the homeless children become child laborers. What do you think of their bad life?
Let’s make a wonderful program to help these children return to live like other people. I think we should call for(呼吁) ending the war. We give support to these poor child laborers through raising money. So they can live in warm houses, get a good education and live a happy life. We hope there will be smiles on their faces. If you’d like to join the program, please come to our community services.
这是标答~~!

（82*9+4）/7=106

解题思路：考查基因的显性和隐性以及它们与性状表现之间的关系，基因在亲子代之间的传递和染色体在细胞中的存在形式．

（1）、生物学上把后代与亲代之间以及后代的个体之间存在的差异现象叫做变异．同种生物同一性状的不同表现类型称为相对性状．豌豆的紫花和白花就是一组相对性状．
如果在后代个体中出现了亲代没有的性状，则新出现的性状是隐性性状，因为隐性性状不容易表现出来，只有当两个隐性基因相遇时才会表现出隐性性状．
（2）、生物体的某些性状是由一对基因控制的，而成对的基因往往有显性显性和隐性之分，当细胞内控制某种性状的一对基因，一个是显性、一个是隐性时，只有显性基因控制的性状才会表现出来．后代中控制某一性状的基因一个来自父方，一个来自母方，后代中白花是隐性性状，其基因组成为aa，说明两个紫花中除了都含有一个控制显性性状的基因A外，还都含有一个控制隐性性状的基因a，故两紫花的基因组成都为Aa．后代基因组成为AA的占紫色花植物比例大约是1：3．
（3）利用组织培养技术，可以在短时间内大批量的培育出所需要的植物新品种，还可以防止植物病毒的危害，极大的提高了农业生产效率．
故答案为：（1）紫花（2）Aa，1：3 （1/3）（3）植物组织培养

点评：
本题考点： 基因的显性和隐性以及它们与性状表现之间的关系；植物的扦插或嫁接．

考点点评： 变异是普遍存在的生命现象，是生物界绚丽多姿的根本原因．生物的遗传就是通过染色体在亲代与后代之间的传递来实现的．