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1.
Laboratory work educates students about the ＂processes of science＂. But it is suggested that students＇ learning level is low because of limited application of science processes in their laboratory work. Extraction experiment was chosen as the topic since it allows students to apply many of their basic chemistry knowledge, and it can be readily to gain understanding of scientific proceses required for an investigation. This study has been carried out with 40 students who are in the first year of Science Teaching Division at Trakya University, Faculty of Education. These students were divided into two groups of the experimental group and the control group, each group containing 20 students. The students of the experimental group were given knowledge about basic scientific process skills, and a procedure in detail to follow was given. But the students of the control group was given a standard procedure. The students of both groups were asked about what and why they did while they were performing the laboratory investigation. We observed that the experimental group students used the basic process skills, understood the extraction experiment, and realized what and why they did from this activity better than the control group students. The control group students did not know why they did laboratory work and they tended to focus on completing the task rather than learning from it. We considered that the experience would be helpful for students to improve scientific process skills if the students successfully acquired procedural understanding. Students＂ scientific processskills will develop as long as they use the skills. 相似文献
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《新高考》2014,(1):17-17
When Nasreddin was a boy,he never did what he was told,so his father always told him to do the opposite of what he wanted him to do.One day,when the two were bringing sacks of flour home on their donkeys,they had to cross a shallow river.When they were in the middle of it,one of the sacks on Nasreddin’s donkey began to slip,so his father said,"That sack is nearly in the water!Press down hard on it!"His father of course expected that he would do the opposite,but this time Nasreddin did what his 相似文献
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Carnations were first discovered in the Far East. These flowers are widely mentioned throughout Roman mythology(神话) and appear in the natural history records of the Roman writer Pliny, back in 50 B.C. Cultivation(培育) of the carnation began in the late 13th century, by Roman monks. They were very important to the Greeks and Roman and became the symbol for the Romans at their peak in civilization. They were also known as "Jove's flower" in Rome because Jove was one of their most admired gods. In ancient Greece they were the most adored flowers. According to a Christian legend, when Jesus was carrying the cross, Mary saw him and began to cry. Carnations began to grow where her tears fell. 相似文献
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Samples of sufu, a traditional food product made by fermenting soybeans, were collected in the city of Anshun in Southwest China and their bacterial diversity was investigated. Nine samples were divided into groups A–C, according to the markets in which they were collected, and the samples were subjected to pyrosequencing of the 16 S rRNA V3–V4 regions for evaluation of the bacterial community. A total of 342 operational taxonomic units(OTUs) were determined. One of the samples(B2) included as many as 286 OTUs, and it also displayed the greatest bacterial richness. The most abundant bacterial diversity was shown in group B. Firmicutes was the dominant phylum in groups A and B, while Proteobacteria was the dominant phylum in group C. Lactobacillus was the prevailing genus in group A, Tetragenococcus in group B, and Empedobacter in group C. The bacterial composition of sufu depends, to a large degree, on the manufacturer. The obtained results showed regional differences in the bacterial community patterns of sufu products, which could contribute to a better understanding of the fermentation and ripening bioprocesses of sufu. 相似文献
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The story happened in France began with a little nice metal can lying quietly on a concrete pillar.A boy's voice was talking about the games he liked most to play.His name is Julian.The can was a present sent by his mum,who was seriously ill and loved him very much. One day,a girl called Sophie came into his sight.She came from Poland,and not accepted by French people.The boy gave the can to her and the story between them started from then on.They made bets on a lot of crazy things,making fun of the teacher, pulling the big cake to the floor on a wedding ceremony... With the can and these bets,they grew up,but the only thing unchanged was their still communicating with each other making 相似文献
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Guo-dong SHAN Guo-qiang XU You-ming LI 《Journal of Zhejiang University. Science. B》2013,14(9):844-848
The objective of this study was to investigate the endosonographic appearance of gastric linitis plastica(GLP) and to study the usefulness of endoscopic ultrasonography(EUS) for the T and N staging of GLP.EUS examinations of 55 patients with histologically proven GLP were retrospectively studied.In all patients,EUS showed that lesions involved at least one-third of the circumference of the stomach.Based on the findings of the EUS,the 55 patients were divided into two groups.There were 32(58.2%) patients in the first group.EUS of this group showed that the five sonographic layers had disappeared and had been replaced by a hypoechogenic thickening of the gastric wall.There were 23(41.8%) patients in the second group.EUS of this group showed that the first three sonographic layers were blurred and thickened,and the fourth layer was significantly thickened.The full thickness of the gastric wall was significantly thicker in first than in the second group of patients(P<0.01).The incidence of perigastric lesions was significantly higher in the first than in the second group of patients(P<0.01).Results for the 15 patients following preoperative EUS were compared postoperatively with histopathologic findings for T and N staging.The overall diagnostic accuracy of the T stage was 73.3% and of the N stage was 60.0%.In eight patients,we used EUS to assess a therapeutic response.No response was observed in five patients and a partial response in three.EUS images of GLP are characteristic.EUS is helpful in diagnosing GLP and for assessing the T and N stages. 相似文献
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CHEN Ching-shu 《美中教育评论》2009,6(1):12-18
The purpose of the research is to explore second graders＇ concept of number development and quantitative reasoning. For this purpose, there were two stages of trials for the children. The first trial was concrete objects. After three months, the children participated in the second trial of half concrete objects. Since understanding the process of solving problems in children is necessary, the researcher observed how children used strategies to discriminate numerosity. After that, the researcher interviewed some students. The research sample came from second graders in Taiwan and Hawaii elementary schools. Twenty students participated in each place. In addition, it was observed whether numerical discrimination strategy in children is the same as in adults. The sample included 20 adults. The result of the research showed that Taiwanese and Hawaiian children reached up to a 90% rate of correct answers in the trial of real objects. However, in the trial of half concrete objects, the rate of correct answers was down to 65%, especially when children compared two quantities of 5：6 ratios. As for strategy, the strategies of the children who gave correct answers were the same as the adults who gave completely correct answers. Because their discrimination was not influenced by distance effect, they could judge the numbers correctly. However, the children who got 90% correct answers were impacted by distance effect, but not influenced by the size of the object. The research suggests that teachers give children real objects to estimate or discriminate the quantities of numbers in their lives. 相似文献
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Jude the Obscure was Thomas Hardy’s last novel creation,and he spent eight year from preparation to publication.Although this novel received a lot of criticisms instead of praises when it came out,it also can be considered as Thomas Hardy’s classical works.The theme of this novel is so brave to explore the existing women’s living circumstances in that time.With the industrial revolution in England,new thoughts and ideas sprang out.Women were no longer belonging to husband and family,and they began to be aware of their social roles and reconsider their identity in society and marriage.The aim of the paper is to analyze this novel from the feministic perspective and re-read the character of Sue Bridehead in the light of the theory"the girl of the period". 相似文献
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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 相似文献
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严岩飞 《中学英语园地(高三版)》2005,(9)
One evening a young man at Oxford who was known to be something of a poet read one of his poems to a small group of friends in his room. The poem was greatly admired, but as they came away one of the friends, Charles, said, "I was very much interested in Alfred's poem-but it was stolen from a book."This remark was repeated to Alfred, who was very annoyed and demanded an apology. “Well,”said Charles,“I don't of ten take back what I have said,but on this occasion I admit I was mistaken… 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献
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唐芳 《读与写:教育教学刊》2008,5(6)
During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context. 相似文献