A Clever Cat

<正>A little cat is on her way to school.She is singing as she is walking.A snake is looking for something to eat.It sees the cat and wants to eat her very much.And it comes to the cat.The cat also sees the snake and she is very afraid.So she runs away as fast as she can.Of course the snake won’t let her run away.It     

蛇山头近代名胜

该文首先介绍了武昌蛇山头的简要建筑历史及近代名胜的概况,然后,介绍了几个近代名胜建筑的具体实例,重点是为纪念湖广总督张之洞而建的几座名胜.     

远程供水系统蛇颌式带接头软管收卷机构仿生学设计与控制

远程供水系统是重大火灾扑救和城市排涝的重要装备。针对带接头软管收卷机构这一远程供水系统重要部件，通过对蛇的颌骨构造研究并开展仿生学设计，提出了一种新型蛇颌式收卷机构原理，具有结构简单、工作可靠的特点。针对软管收卷速度控制问题，提出了一种速度反馈加修正的收卷速度控制方法，既能避免误差累积，也不会产生频繁修正调整的情况，能够达到较好的收卷效果。     

Visiting the Zoo

<正>Last Sunday, my friends and I visited the zoo in our city. In the zoo, we learnt about many animals. The horses sleep on their feet. The shortest snake is only 10cm long. The butterflies taste food with their feet. Some frogs can change their colours. Those are very amazing. We had a great time in the zoo.     

Arsenic and heavy metal contamination of vegetables grown in Samta village,Bangladesh

Drinking of arsenic (As) contaminated well water has become a serious threat to the health of many millions in Bangladesh. However, the implications of contamination of agricultural soils from long-term irrigation with As-contaminated groundwater for phyto-accumulation in food crops, and thence dietary exposure to As, and other metals, has not been assessed previously in Bangladesh. Various vegetables were sampled in Samta village in the Jessore district of Bangladesh, and screened for As, Cd, Pb, Cu and Zn by inductively coupled plasma emission spectrometry (ICP-AES) and inductively coupled plasma mass spectrometry (ICP-MS). These local food products are the basis of human nutrition in this region and of great relevance to human health. The results revealed that the individual vegetables containing the highest mean As concentrations microg x g(-1)) are snake gourd (0.489), ghotkol (0.446), taro (0.440), green papaya (0.389), elephant foot (0.338) and Bottle ground leaf (0.306), respectively. The As concentration in fleshy vegetable material is low. In general, the data show the potential for some vegetables to accumulate heavy metals with concentrations of Pb greater than Cd. Some vegetables such as bottle ground leaf, ghotkol, taro, eddoe and elephant foot had much higher concentrations of Pb. Other leafy and root vegetables, contained higher concentrations of Zn and Cu. Bioconcentration factors (BCF) values, based on dry weight, were below 1 for all metals. In most cases, BCF values decreased with increasing metal concentrations in the soil. From the heavily As-contaminated village in Samta, BCF values for As in ladies finger, potato, ash gourd, brinjal, green papaya, ghotkol and snake gourd were 0.001, 0.006, 0.006, 0.014, 0.030, 0.034 and 0.038, respectively. Considering the average daily intake of fresh vegetables per person per day is only 130 g, all the vegetables grown at Samta had Pb concentrations that would be a health hazard for human consumption. Although the total As in the vegetables was less than the recommended maximum intake of As, it still provides a significant additional source of As in the diet.     

The serpent column: the persistent meanings of a pagan relic in christian and islamic constantinople

ABSTRACT

In the heart of Istanbul, on the site of the former hippodrome, stand the remains of the Serpent Column, one of the most ancient and most enigmatic monuments in the city: a three-headed snake made of bronze to which various sacral and magical properties have been attributed in the past by pagans, Christians, Muslims, and Jews. Originally set up as a votive offering in Greece's central sacred site, Delphi, the column commemorated the Greek triumph in the Second Graeco-Persian War (480–479 BCE). This powerful icon of victory, couched in pagan principles of cosmology, was brought to Constantinople in the fourth century CE to become an emblem of the universal rule of the Christian Roman emperor. In late Byzantine and Ottoman times, the Serpent Column was seen as an apotropaic talisman safeguarding Constantinople from poisonous snakes. In this paper it is argued that the column retained its status as a powerful sacred object for so many centuries because in Constantinople it came to be associated with the Brazen Serpent lifted up in the desert by Moses (Numbers 21:4–9), which in turn was believed to prefigure the crucifixion and resurrection of Christ (John 3:14–15).     

仿生象物的营造意匠与客家建筑（上）

本文探讨客家建筑的仿生象物营造意匠，认为它是追求天地人和谐合一的哲学思想体系的产物，其文化渊源为生殖崇拜、图腾崇拜和风水观念，并从法人、仿动物（包括凤凰、龟、龙、牛、螃蟹、蛇等）、仿植物(莲花等)、象物（包括船、棋盘、八卦等）几方面，研究其文化内涵。     

The Value of Reading Books

<正>People often say that gold and silver are the most valuable things in the world.But I don’t think so.In my opinion,reading books is more valuable than anything else.The old saying"To open a book is always helpful"clearly tells us how good it is to read a book.Books are our friends.They introduce to us different kinds of knowledge.They lead us     

Should We Take Tutorial Classes?

<正>Nowadays,more and more students take tutorial classes.I made a survey on what my classmates think of it.60%of the students think it is good for them to take tutorial classes.They think studying in tutorial classes is better than     

浅谈武汉大学历史建筑的建筑历史

作为全国重点文物保护单位,武汉大学的校园历史建筑有其独特而珍贵的历史价值和艺术价值,是中国近代高等学府建筑的佳作和典范。在经历了几个重要的历史时期后依然散发着昔日的光辉,记录着它所经历的历史与沧桑。武汉大学历史建筑在中国近代建筑史上也具有里程碑的意义,对中国近代建筑发展历程中解决传统与现代、民族化与国际化的结合问题上,提供了一定的启示与示范的作用。