首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   27篇
  免费   0篇
教育   25篇
科学研究   2篇
  2013年   1篇
  2012年   2篇
  2011年   2篇
  2010年   3篇
  2009年   1篇
  2008年   3篇
  2007年   3篇
  2006年   2篇
  2005年   7篇
  2004年   2篇
  2002年   1篇
排序方式: 共有27条查询结果,搜索用时 15 毫秒
21.
A m onkey is a kind of m am m als(哺乳动物).M onkeys like to range(漫游) through the forests. They are clever and can help each other.Som e m onkeys are too old to walk out for food.The young m onkeys alw ays help them and givethem som e food to eat. If an old m onkey dies ofillness,the young ones will place(放置)the deadbody in the ground and pray(祈祷)for him ,justas a hum an often does. W hen the thorns (刺 )prick (扎痛) a m onkey s finger, the other willpick(取去)the thorns from its finge…  相似文献   
22.
企鹅(英文)     
Apenguinisakindofwaterfowl(水鸟).MostpenguinsliveontheAntarcticContinent(南极洲).Itisthecoldestplaceontheearth.Thepenguinsfeathers(羽毛)growmuchthickerfromitsskin(皮肤)thanthoseoftheotherwater-birds,sotheydontfeelcold.Theylovetodive(潜水)forcatchingfish.Astheyareveryfat,theycanonlywalkbutnotfly.Afull-grown(长成的)penguinweighsaboutfortykilograms(公斤),butsomeyoungonesweighonlyonekilogrameach.Alotofpenguinsareoftenearlytoriseandlatetogotosleepinor-dertotakegoodcareoftheiryoungones.Otherwise,…  相似文献   
23.
Dogs are flesh-eating animals. From the Stone Age( 石器时代) menlived in caves( 洞穴). The dogs first became man?s friends. Soon the mentrained( 训练) the dogs to help people in the hunt to carry their burdens(担子), to guard their camps and so on.Dogs have a fine sense of smell ( 嗅觉). They can go in search ofmissing things. For example, a golden seal(图章) in a museum(博物馆)was missing some years ago, and the policemen searched for it every-where in vain(徒劳). Finally a dog found the go…  相似文献   
24.
Healthy Habits     
Exercise is a healthy habit. When daytime comes, you must get up. This is the time for exercise. Walking, running, jogging and playing games are all healthy forms of exercise.  相似文献   
25.
A walrus(海象) is a kind of amphibians(两栖动物). Many of them live on the islands(岛) of the Arctic Ocean(北冰洋). There were very few people living there. One day a hunter named Tom and his brother, Jack, got there by boat.Suddenly they saw a young walrus swimming in the river. They wanted to catch it alive. Tom threw(投掷) spears(梭镖) at its head, then he tied it up(把......拴在) to a tree because he wanted to have a rest. It began to cry. When some big walruses heard it crying, they c…  相似文献   
26.
目的:掌握潜山县农村5岁以下儿童死亡情况及主要死因,并探讨干预措施。方法:对2004-2007年四个抽样乡5岁以下儿童死亡监测点上报的死亡现状,死因结构及相关因素进行分析。结果:5岁以下儿童死亡率有逐年降低趋势,5岁以下儿童死亡原因主要为出生窒息,早产和低出生体重、意外、先天异常等。结论:降低潜山县农村5岁以下儿童死亡率必须加强围生期保健、产前诊断及住院分娩,强化窒息复苏技术的培训,提高儿童安全防范意识,提高产前诊断及筛查能力,积极改善农村儿童的生存水平。  相似文献   
27.
Antsliketolivetogetherunderthesurface(表面)oftheground.Differentantsaredoingdifferentjobs.Theworkerants(工蚁)lookforfoodalldaylongandtheyaregoodatrepairingnests(巢穴).Somefoodandnestsareforthemselves.Therest(其余)arefortheothers.Whenitissunny,sometimestheyaremovingdamp(潮湿的)foodtotheoutsideoftheirnestsinordertomakeitdry(干的).Thesoldierants(兵蚁)actasguardsandsoldiers.Whenenemyin-sects(昆虫)arecoming,theyswarm(群集而动)towardsthem.Thoughmanysoldierantsoftengethurt(受伤)todeath,therestgoonf…  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号