28. Maya遗迹
The results from an autecological study of the growth, reproduction, and population dynamics of Brosimum alicastrum in southern Mexico are applied to the controversy surrounding the use of this species in Maya subsistence practice. The frequent occurrence of B. alicastrum near ruins is explained by its competitive advantage on shallow limestone soils coupled with a continual input of bat-dispersed seed. Populations of the tree at Tikal are then compared with other naturally occurring populations as an example of how a detailed ecological analysis may furnish valuable insight into the historical use of a plant species. The Tikal populations are shown to be atypical in terms of phenology, productivity and breeding systems, suggesting that some form of artificial selection may have been practiced by the Maya.
体坛英语资讯:Egypts Kamel storms Uganda Junior Intl Badminton Open semi final
国际英语资讯:White House chief economic advisor Gary Cohn resigns amid tariff disputes
Dress For Myself 为自己而穿
The Perfect Relationship 完美的爱情
国际英语资讯:Syrian army enters key Kurdish-held town in northern Syria amid Turkish assault
“鳄鱼的眼泪”之说从何而来?
这些迹象表明你还没有准备好结婚
吃水果真的能瘦
国际英语资讯:Spotlight: UK police take firm actions against environmental protests amid disruption in Lon
体坛英语资讯:Argentina, Israel to play pre-World Cup friendly
体坛英语资讯:Gong Lijiao wins Chinas first medal at World Indoor Championships from womens shot put
人大预算审查监督重点向支出预算和政策拓展
星巴克出新饮品?品相看起来还很不错!
体坛英语资讯:Neymar to undergo surgery on fractured foot
国际英语资讯:Sri Lankan president signs gazette declaring week-long state of emergency
Better angels?
国内英语资讯:Xi meets representatives of PRC anniversary celebrations personnel
对朝非法贸易影响制裁效果
国际英语资讯:Syria defends military operation against rebels in Eastern Ghouta
Through the office grapevine?
国际英语资讯:Netanyahu associate turns state witness in corruption cases involving PM
“鳄鱼的眼泪”之说从何而来?
体坛英语资讯:China wins womens team crown in 2019 Asian Table Tennis Championships
国际英语资讯:U.S. House passes resolution opposing Trumps Syria decision
体坛英语资讯:Momota, Chen Long advance into BWF China Open 2nd round
体坛英语资讯:Feyenoord and AZ reach Dutch Cup final
为什么聪慧成功的女性会约会困难?
美文赏析:30岁以前请明白这10个道理
罗斯柴尔德的王朝传承
研究表明 泡澡的减肥效果可以和步行30分钟媲美!
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |