Exotic species are assumed to alter ecosystem functioning. However, little is known of the relationships within vertically structured plant communities such as
Climate change is not just a global problem. When ecological conditions are altered by people, local climate will also be transformed. This local climate change
最近听了一堂“好评如潮”的课。其好评主要集中在“教师从头到尾共有近百个提问”——据说是“既培养了学生的问题意识”,又“真正实现”了“双主”。一堂课,我记录了:1.所有的
Soil compaction is a limitation to establishment of native forest species on reclaimed surfacemined lands in Appalachia. Previously, non-native forage species s
理论话语并非是学者的专利,现在我们时常感受到,许多校长和教师的文章和谈话更像是学者。令人尴尬的是,有些校长的管理和教师的教学并不如他们写的和说的那么精彩和深刻。就大多
The soils that lay below humid ecosystems are characterized as being significant holders of carbon. Because of the great susceptibility of this type of environm
紧紧围绕经济建设这个中心,积极发挥国家权力机关的作用,全国人大和省级人大正在加强加快全国性与地方性立法工作,以保障改革开放和现代化建设的顺利进行。这无疑是必要的。
寄生虫的能量主要来源于无氧糖酵解,乳酸脱氢酶(LDH)是糖酵解途径的末端酶,催化丙酮酸还原为乳酸及乳酸氧化为丙酮酸的可逆反应。对有关寄生虫LDH分子结构与功能的研究以及虫体药
D ating for M otherW hen the young w aitress in the caféin Tom s building started w av-ing hello every day,Tom was flattered,for she was at least15yearsyou
目的:了解近年非淋菌性尿道炎(NGU)和淋菌性尿道炎(GU)病原体感染分布情况.方法:应用分泌物培养、荧光单克隆抗体及聚合酶链反应(PCR)等技术,对872例NGU及GU患者进行淋病奈瑟