Radiation doses and cancer incidence among the population living within 25 km of three nuclear power plants (NPPs) in Ontario, Canada were investigated for the
回顾了有关围术期患儿家属陪护行为的研究现状，分析了围术期家属陪护行为的可行性，并对其影响因素及调节办法进行了探讨。
The dissociation of ammonium (NH4+) into ammonia (NH3) in wastewaters is a key factor governing atmospheric nitrogen volatilization. Relatively rich in total am
Leaf litter input from riparian landscapes has been identified as both a major energy flow to stream ecosystems and as a food source for stream macroinvertebrat
中国传统建筑历经数千年的发展,一脉相承,自成体系,对周边国家乃至亚洲大部分地区影响深远,是世界建筑史上重要的组成部分。建筑是文化的载体,在其发展的过程中,物质性需求如
Study of the impact of traffic emissions on air quality around the Haram Mosque in Makkah, Saudi Arabia, was conducted experimentally, numerically and statistic
目的:探讨超声心动图在甲状腺功能亢进性心脏病诊断中的临床价值。方法:选取甲状腺功能亢进性心脏病患者30例作为观察组,选取同时期的健康体检者30例作为对照组,对所有患者实
中国自秦以降,称皇帝者数百人,但能冠以“好”字者不多,大多数非昏即暴,或是极其平庸,让臣民认为,换谁干都一样,或是换谁都比该家伙强。而纵观历史,好皇帝的出现,有极大的偶然性,许多昏暴、平庸的皇帝的产生,却是必然的结果。 自夏朝第二任君王姒启将“天下为公”改为“天下为家”之后,帝位的传承,就由选举、禅让变成了父死子继辅以兄终弟继,即“世袭制”。这一制度,最适合人类自私的本性,成为以后各朝所有皇帝的