Lipstick

A certain private school in Washington recently was faced with a problem. A number of 12-year-old girls were beginning to use lipstick and would put it on in the bathroom.That was fine…but after they put on their lipstick, they would press their lips to the mirror, leaving many little lip prints. Every night, the cleaner would remove     

基于自适应控制的非线性系统的滞后同步

Active control is an effective method for synchronizing two identical chaotic systems. However, this method works only for a certain class of chaotic systems with known parameters. An improvement method was proposed in order to overcome this limitation in this paper. A classical example was used to demonstrate the method. Finally, numerical examples were given to validate the efficiency of the method.     

你问我答

问:I think he isto win.but I’mnot sure.(A.possible B.1ikely C.impossible D.certain)此题的正确答案为B,为什么不选其他选项呢?(淮北关苗苗)答:从语意上看,D肯定不能选,be certain to do sth表示"一定做某事",与下句矛盾;从英语习     

certain与sure的异同比较

一、两者在用法上的相同点两者都可用作表语,表示“一定”或“确信”,有时可互换。互换的场合应注意以下几点用法:1.表示说话者的态度或看法即表示说话者自己的态度或看法,其意为“一定会”“肯定会”。此时主要用法有:(1)单独用作表语。如:One thing was sure[certain]:they!d be late.有一件事是确定无疑的,他们会迟到。(2)后接不定式。如:He!s certain[sure]to win.他一定会成功。They!re certain[sure]to need help.他们肯定需要帮助。If you do this,you are certain[sure]to be found out.如果你这样做一定会被发现。2.表示句子主语…     

劳心费神的高考-ed分词试题

1. (MET 1987) Most of the people to the party were famous scientists . A. invited B. to invite C. being invited D. inviting2.(MET 1990) Most of the artists to the party were from SouthAfrica.A. invited B. to inviteC. being invited D. had been invited3. (NMET 1994) The first textbooks for teaching English as a foreignlanguage came out in the 16th century.A. having written B. to be written C. being written D. written     

Influence of learning techniques on information processing

The present study establishes the fact that effective information processing is dependent on the learning techniques one adopts. A sample of 100 students in the age group from 13 to 17 including boys and girls were chosen. They were divided into two groups of control and experimental. To the experimental group, certain specific learning techniques were taught for a period of six months. The same group was tested taking blood samples to study the neuro transmitter serotonin levelshenme before and after adopting learning techniques. Results of the study proved that there is significant relationship between learning techniques and the information processing ability of an individual.     

“完形填空”高考冲刺专练(英文)

(A) Mobile phones are everywhere in big cities. It seems that 1 can survive without one. Mobile phones are a great 2 to stay connected with friends and family. 3 , it is important to remember that there are certain times 4 you should not be using your phone, especially as a student during school.     

Immunomodulatory function of orally administered thymosin α1

Objective: To investigate the immunological function of a yeast expression system for thymosin α1(Tα1). Methods: A constructed Tα1 yeast expression system was used to investigate the immunological function of orally administered Tα1. Dried yeast containing three different concentration of Tα1 was fed to normal Balb/c mice and other Balb/c mice whose immunities were inhibited in advance by cyclophosphamide. Synthesized Tα1 peptide was used as positive control and dried yeast with empty plasmid was used as negative control. CD4 and CD8 levels were detected by flow cytometry assay. TNF-α IFN-γ IL-2, IL-6 and IL-10 levels were detected by liquid chip. Results: In normal Balb/c mice or immune inhibition Balb/c mice, CD8 levels were significantly increased. Especially in immune inhibition Balb/c mice, CD8 levels in synthesized Tα1 group (18.77％±4.72％),small dose group (13.48％±6.17％) and large dose group (22.74％±1.09％) were significantly higher than that in empty yeast control group (7.49％±2.14％). Conclusion: Orally administered Tα1 has its certain immunomodulatory function.     

凹资源配置问题的混合动态规划方法

Concave resource allocation problem is an integer programming problem of minimizing a nonincreasing concave function subject to a convex nondecreasing constraint and bounded integer variables. This class of problems are encountered in optimization models involving economies of scale. In this paper, a new hybrid dynamic programming method was proposed for solving concave resource allocation problems. A convex underestimating function was used to approximate the objective function and the resulting convex subproblem was solved with dynamic programming technique after transforming it into a 0-1 linear knapsack problem. To ensure the convergence, monotonicity and domain cut technique was employed to remove certain integer boxes and partition the revised domain into a union of integer boxes. Computational results were given to show the efficiency of the algorithm.     

How Did Basketball Came into Being？

Basketball is still a young game. It‘s over a hundred years old. In the Winter of 1891, a certain eollege(学院) was having some trouble with its boy students. The weather was bad and the students had to stay indoors. As they couldn‘t play outdoors, they were unhappy, and some even got into fights time to time.     

高一英语上Units 7-8单元综合检测题

第Ⅰ卷(三部分,共115分)第一部分:听力(略)第二部分:英语知识运用(共两节,满分45分)第一节:单项选择(共15小题;每小题1分,满分15分)从A、B、C、D四个选项中,选出可填入空白处的最佳答案。21.The students,if well,will passthe exam ination without m uchdifficulty.A.preparing B.preparedC.preparing D.prepared for22.Children at the beginning of thiscentury a lot andthem selves greatly even withouttelevision.A.used to readB enjoyingB.used to readD enjoyC.were used to readingD enjoyD.were used to readD enjoyin…     

My Sunday

Sunday,March10,2005FineWe went to East Hill Park plant(1)trees today.We met at the school gate in the morning at7:00(2).A nd then we took a bus to(3)there.A ssoon as we arrived,we began to work.W ewere busy planting trees the w hole m orn-ing.A ll of w e(4)worked very hard.A tabout1:30,we had lunch.A fter lunch wehad a rest and(5)w e clim bed up the hill.It w as very nice to be in theopen air.A t4:00w e w ent hom e by a(6)bus.W e were all tired,but wefeltvery happy.点评:本文是一篇学生日记…     

Questions and Answers

1.问:1)贵刊在2001年第5期“高考情态动词考点例析”文章中的第7小题是:I wonder how he_that to the teacher.A.dare to say B.dare saying C.not dare say D.dared say 答案为D。选A和D是否都对?有何区别呢?2 ) Each desk and each chair_put in its proper place.A.was B.were C.had D.has 请问选哪一个?为什么? (浙江苍县求知中学陈小芳)     

A Lucky Escape

This story concerns(有关)a spider(蜘蛛)and a certain general of ancient times who had lost a battle and,in the company of(在……陪同下)a faithful(忠诚的)servant,was trying to escape(逃脱)from the enemy.Both were extremely(极度,非常)tired,and both were hungry and thirsty,but they did not dare to go into any town for fear of (担心,害怕)being discovered and captured(捉)by the enemy.Toward evening they arrived at a mountain where there was a small cave.     

初三英语寒假综合复习题(英文)

Ⅰ.单项选择(每小题1分,共15分)1.D o you know about E nglish nam es?A.som ething interesting B.interesting som ethingC.anything interested D.interesting anything2.—W ould you please to our party this evening?—Y es,.A.com e;I’ll be gladB.com e;I’ll be glad to C.to com e;I’d love to D.com ing;I’d like to3.Ten years later,good friends.A.they were both still B.they all were stillC.both they w ere still D.they still all w ere4.If you study,you’ll catch up with.A.enough hard;other B.har…     

Questions and Answers

1.问:1) The people there felt____not so difficult to work with him.A.it B.its C.it's D.this 应选A,但我认为C也可以。老师说C项改为it was才能保持时态一致,可it’s不就是it was的缩写吗?2 ) It was only in the eighteenth century____people began to think thatmountains were beautiful.A.when B.which C.that D.and 答案选C,请问A怎么不行呢?     

主谓一致练与析

从 A, B, C, D 四个选项中, 选出可以填入空白处的最佳选项。1. The number of people invited forty, but a number of themabsent for different reasons.A. were; was B. was; wasC. was; were D. were; were2. A library with four thousand books to the nation as a gift     

英语第三册期末模拟试题

一从下列各题的四个供选择的答案中选出一个正确的答案,并在该答案的题号上划圈,多划者无效。(每题1分,共20分) 1 .Nobody,s watehing the television. Cot一ld yotl? A .turno一飞it B.tL一rn off it C .t、一rn it off D.t:lrzl it on 2 .There a bt一5 stoP near ot一r village·7 .Sher!oek Holmesman ealled Sir ArthurA.ereatedB.were ereatedC .was ereatedD.ereates byaConan Doyle.uses to beused beB.use to beD.used to be3 .1 want to have my wateh A.rePaired B.rePairing C .rePair D.to be rePaired4 .1 would …     

初二英语(18—20)单元检测

Unit1 8 Come to the party! .单项选择1 .Would you like to my party?　 A.came　 B.coming　 C.come　 D.to come2 .Now everything ready for the birthdayparty.　 A.are　 B.is　 C.were　 D.was3.Lucy go to Ann's birthday party.　 A.like very much　 B.would love to　C.love　　　　　　D.will like4.All the food on the table.　A.is　B.are　C.were D./5. a great party!delicious the cakeis!　A.What;What　 B.How;How　C.What;How　 D.How;What6.There was to have breakfast. We hadto go.　 A.not time…     

高考单项填空中的过去分词

Choose the right answers for the blanks.1. (1985)-There's a hole in your bag. -I know. I am going to have itA. mend B. mending C. mended D. to be mended2. (1986)He had his leg in the match yesterday.A. to break B. broken C. break D. breaking3. (1987)Most of the people to the party were famous scientists.A. invited B. to invite C. being invited D. inviting