一. George is young man. He ( not have ) a wife, but he( have ) a dog, and a car. He likes playing games. Last Monday, he ( play ) games for an hour. Then he ( run ) out and ( jump )into a car. His dog( come ) after him, but it ( not jump ) into the same car, it ( sit ) in the next one. " Come here, silly(傻) dog!" George said. But the dog (stay) in the other car. George ( put ) his key (钥匙 ) into the clock (锁 ) of the car, but the key can ( not turn ). Then he looked at the car again. It ( not be ) his car. he was in the wrong car. And the dog was in the right one. "Thank you clever dog!" George said and ( get ) into his own(自己的 ) car with the dog.
二.I 选词填空 Three, he, arrive, still, past, begin, after, something, hour, other Bob was tired of waiting for his sister's plane to .The plane should have come at half three p.m. and now, seven later. Bob was waiting. There had been times for him to hear the explanation(解释) who the plane was late from the loudspeaker.__ the first time, Bob had got to eat. The second time he to walk in the airport from one end to .By the third time he was tired and hungry. "How much longer will this go on?" Bob said to.
  1.The children( pick) lots of pears yesterday.
  2.What you now? I (write) a letter. When you (finish)? soon.
  3.I (come) back in a few minutes. Please wait for me.
  4.Please (tell) him if he (come) back.
  5.A young man (call) John often helps Mrs Brown (look) after her baby.
  6.The broken desk is too heavy for the little girl (carry)
  7.Don't , you know is bad for your health. (smoke)
  8.How heavily it ! If it keeps , we have to stay here. (rain)
  9.What shall we for our picnic?How aboutsome fruit? (take)
  10.Will your headmaster at the meeting? Yes, he will about studying. (speak,say)
Mr Read was a businessman. He hurried down to the hall of a big hotel. He was going back to his company in New York soon. It was 4:40 p.m. And the plane was leaving in half an hour's time. He had to take a taxi to get to the airport. So he paid his bill quickly. Just when he was leaving the hotel, he remembered that he had left his ID card in his room. So he said to one of the waiters, "Run up to my room, girl. See whether there's a card on the bedstand. Hurry up!" The girl ran to his room upstairs. Ten minutes later the girl came down to the hall. "Yes, sir. There's an ID card on the bedstand," said the girl to Mr Read, out of breath. ( )⒍The story happened in . A. New York B. an airport C. a hotel D. a room ( )⒎Mr Read worked in a . A. school B. factory C. supermarket D. company . ( )⒏Mr Read was going back to New York by A. taxi B. train C. water D. air ( )⒐It took the waiter about minutes to run to Mr Read's room from the hall. A. five B. ten C. fifteen D. twenty
( )⒑Mr Read to hear the waiter's word. A. was glad B. got angry C. felt sad D. left the hotel
In England people can experience four seasons in one day. So they often talk about the weather. In the morning the weather is warm like in spring. After an hour black clouds come and then it rains heavily. The weather gets a little cold. In the afternoon it will be sunny, the sun will begin to shine, and it will be summer at this time of day. In England, people can also have summer in winter, or have winter in summer. So in winter they can swim at times, and in summer sometimes they need to wear warm clothes.When you go to England, you will see some English people usually take an umbrella with them in the sunny morning, but you should not laugh at them. If you don't take an umbrella, you will regret later in the day. ( )⒒In England people like to talk about the . A. weather B. seasons C. spring D. summer ( )⒓In England in winter. A.it's always very cold B.people always wear warm clothes C.the weather is very hot D. people can swim sometimes ( )⒔English people usually take an umbrella or a raincoat with them on a morning. A. sunny B. rainy C. snowy D. A, B and C ( )⒕When come, there will be a heavy rain later on. A. spring and autumn B. summer and winter C. sun and snow D. black clouds later in the day. ( )⒖If you don't take an umbrella, you will feel A. glad B. worried C. angry D. sorry
Pat Hogan was traveling around the country in his car. One evening as he was traveling along a road and looking for a small hotel, he saw an old man at the side of the road. He stopped his car and said to the old man, "I want to go to the Sun Hotel. Do you know it?" "Yes. I'll show you the way, " answered the old man. He got into Pat's car, and they drove about twelve miles. When they came to a small house, the old man said, "Stop here. " Pat stopped and looked at the house. "But this isn't a hotel, is it?" he said to the old man. "No. This is my house. Let me show you the way to the Sun Hotel now. Turn around and go back nine miles. Then you'll see the Sun Hotel on your left." ( )⒍Pat wanted to find a hotel because it was . A. raining B. getting dark C. so cold D. too hot ( )⒎Pat stopped his car because he wanted to . A. ask the way B. have a rest C. mend it D. have supper ( )⒏Pat was miles from the Sun Hotel when he met the old man. A. three B. nine C. twelve D. twenty-one ( )⒐How did the man go back home after he met Pat? A. By bus. B. On foot. C. By bike. D. By car. ( )⒑What do you think of the man? He's good. B. He's kind. C. He's clever. D. He's foolish. 二 I still remember visiting Moscow. It is the capital of Russia, the b 1 country in the world. I went there w 2 my parents when I was eight years old. I lived and studied there for one year, I had some happy memories. One of the most interesting things of that city was that t 3 were many dogs. Perhaps Russians l 4 dogs very much. You can see dogs here and there. Almost each of the families had a dog. I made friends with many Russian children w 5 I was living and studying there. They were all very nice. They had fair hair and fair skin. I played with them h 6 though I could only speak a little Russian at first. They were f 7
to me. The weather in Moscow was very cold. It snowed almost every in winter. The ground was always c 8 with a lot of snow. We often made s 9 together. Now I am b 10 in China, but I miss them so much. I will never forget my happy memories of this visit to Moscow. 三 These years, with the development of society, more and more teenagers have suffered from stress. Some of the problems can make them feel very w 1 and unhappy all day. Who can help them? A teacher from a college tried his best to help them. He thought of a lot of w 2 to help them. On Monday and Thursday, you can v 3 him. Here are some ideas how to keep the young men healthier in every way. F 4 , it is very important to keep healthy. To get e 5 sleep every day is also necessary. Try to have a healthy d 6 . Secondly, maybe you are not the top students. It doesn't m 7 . The most important thing is to work hard. If you try your best, your teachers and parents will understand you. If you have some problems, you should be a 8 to talk with your teachers and parents. They can help you. Remember to s 9 your happiness and s 10 with your good friends. Sometimes you can go out for a walk. In a word, you can try to make you happy by yourselves. I'm sure you can be happy every day. 四 Before windows were used, old h 1 in Europe(欧洲)and Britain were very dark. Their great rooms ( to were high w 2 only one hole in the roof 屋顶) let the smoke o 3 from cooking fire. Later, people began to make the holes b 4 __ to have more light and air in their homes. The first English window was j 5 _ _ a small opening (口, in the wall. It was cut long to let in as m 6 light as possible, and narrow to keep out 孔) the bad w 7 . But, more wind than light would c 8_ __ in if the window was cut long. This is why it was c 9 _ "The wind' eye" And the word "w 10 _" comes form two ancient 古代的) s . ( words for "wind" and "eye". 五 Thirty years ago, I walked into your bakery and asked for some loaves(条) of bread to sell. At that time, I was 12 years old. A young lady s 1 me that day. She gave me five loaves and wished me good l 2 . I took the loaves and went out to sell them. It t 3 me all day, but I sold them all. At the e 4 of the day, I had some money. I was the h 5 boy in the world as I walked home that evening. The next day, I went to a bicycle shop. I paid a deposit(定金) on a new bicycle.. And then I started my next j 6 as a newspaper delivery() boy. Soon I c 7 pay the rest of the money for the bicycle and the bike was mine. I was so proud of m 8 ! Today I still work in the delivery business. I have a lot of trucks to send goods all over the country. I live in a beautiful house, but I don't ride a bicycle these days. I drive a large nice car. I don't know e 9 that young lady was. But b 10 she gave me the start, I have become a successful man. I'd like to show my thanks to her.
阅读理解 CDDAB ADDDD DCBAA 一.doesn't have, has, played, ran, jumped, came, didn't jump, sat, stayed, put, not turn, wasn't, got 二.arrive,past,hours,still,thee,After,msomething,began,another,himself 三.picked, are doing/am doing/will finish, will come, tell/comes, called/to look, to carry, smoke/smoking, is raining/raining, take/taking, speak/say 二
  4.love/ like
  10.back 三
  10.sadness 四
  3. out
  10.window 五
四,一个小型的无线电广播台考虑如何最好地来安排音乐,新闻和商业节目时间.依据法律,该台每天允许广播 12 小时,其中商业节目用以赢利,每小时可收入 250 美元,新闻节目每小时需支出 40 美元,音乐节目每播一 小时费用为
  17.50 美元.法律规定,正常情况下商业节目只能占广播时间的 20%,每小时至少安排 5 分钟新闻 节目.问每天的广播节目该如何安排?优先级如下: P1:满足法律规定要求; P2:每天的纯收入最大.
  1)个非零的{xij},且满足∑jxij=ai, ∑ixij=bj,就可以作为一个初始基可行 解.
  2.单纯形法计算中,如不按最小比值原则选取换出变量,则在下一个解中至少有一个基变量的值为负. 给出线性规划问题及最终单纯形表.
max z = 2 x1 + 3 x 2 + x3 1 1 1 3 x1 + 3 x 2 + 3 x3 ≤ 1 4 7 1 x1 + x 2 + x3 ≤ 3 3 3 3 x1 , x 2 , x3 ≥ 0
cj CB XB 2 3 x1 x2 cj-zj (
  1)目标函数中变量 x3 的系数变为 6; (
  2)分别确定目标函数中变量 x1 和 x2 的系数 c1,c2 在什么范围内变动时最优解不变. (
  3)约束条件右端项变为[2 3]T; b 1 2 2 x1 1 0 0 3 x2 0 1 0 1 x3 -1 2 -3 0 x4 4 -1 -5 0 x5 -1 1 -1
  4)增加一个新的变量 x6,P6=[1 1] T, c6=7; (
  5)增添一个新的约束 x1+2x2+x3≤
  4. 七,某厂生产 A,B,C 三种产品,其所需劳动力,材料有关数据见下表.如果劳动力数量不增,材料不足时可从市 场购买,每单位
  0.4 元,问该厂要不要购进原材料扩大生产,以购多少为宜? A 劳动力 材料 产品利润 6 3 3 B 3 4 1 C 5 5 4 可用量 45 30
已知某求极大化线性规划问题用单纯形法求解时的初始单纯形表及最终单纯形表如下表所示,求表中各括号内未 知数的值. cj 3 2 2 0 0 0
CB 0 0 0
XB x4 x5 x6 cj-zj
b (b) 15 20
x1 1 (a) 2 3
x2 1 1 (c) 2 0 0 1 (k)
x3 1 2 1 2 (d) (e) (f) (g)
x4 1 0 0 0 (l) 0 0 0
x5 0 1 0 0 -1/4 3/4 (h) -5/4
x6 0 0 1 0 -1/4 (i) 1/2 (j)
0 3 2
x4 x1 x2 cj-zj
5/4 25/4 5/2
0 1 0 0



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