Results 31 to 40 of about 5,113 (110)
Zhejiang Daxue xuebao. Lixue ban, 2015 利用1971~2013年永嘉县夏季高温资料，建立高温过程的时间序列，分析了夏季高温天气的气候特征，并对出现危害性高温时的预警指标作了进一步探讨.研究表明：永嘉县夏季高温天气具有显著的局地性特征，且高温多集中在7月中下旬和8月上旬；副热带高压是影响本地夏季高温的主要天气系统，当本站处在副高脊线附近，高空下沉气流明显，低层在暖脊或暖中心附近，中高层为西南（或偏西）气流时，容易出现危害性高温；危害性高温出现时，天况稳定、云量偏少、日照时数较长、能见度较好、风速较小，且以西南风居多.
LYUJiangshan(吕江山) +4 more
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Downlisting and recovery of species assessed by the IUCN
Conservation Biology, Volume 39, Issue 6, December 2025.Abstract Despite the increasing number of species assessed for extinction risk by the International Union for Conservation of Nature (IUCN) (163,040 species as of 2024), only about 1 in 1,000 have been downlisted due to genuine population improvement. Although this rare conservation achievement has been widely celebrated in several recent cases, some ...
Mu‐Ming Lin +7 more
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Shuitu Baochi Xuebao, 1994 采用数学统计方法，将长江上游约１００万ｋｍ＾２地区划分为９５个样本区。按照危险度高，中、低三个等级，区划出高危险度区约２５万ｋｍ＾２；中危险度区约３２万ｋｍ＾２；低危险度区约３８万ｋｍ＾２。并对三种危险度区域内的滑坡危害作了概述。
乔建平 张小刚
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Chinese Verb Frames in Primary Education: From Basic Communication to Cognitive Complexity
International Journal of Applied Linguistics, Volume 35, Issue 4, Page 2301-2316, November 2025.ABSTRACT This article investigates text complexity in Chinese‐language textbooks for primary school students (Grades 1 to 6) in Hong Kong. Our analysis, based on verb frames in Mandarin VerbNet, shows a developmental shift in the linguistic input in first language (L1) education: Students begin with a focus on core frame elements in lower grades and ...
Tianyuan Cai +2 more
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Shuitu Baochi Xuebao, 2011 运用对照分析方法,以大庆市七五土壤重金属含量、黑龙江省土壤背景值和国家土壤环境质量标准为对照,对比分析大庆地区不同土地利用类型(工业用地,未利用地,草地,旱田和水田)土壤10种重金属(As、Cd、Cr、Cu、Hg、Ni、Pb、Zn、V、Mn)含量变化规律,并进行了生态危害评价。结果显示:As、Zn、Hg、Pb含量最高的是工业用地,Cd、Cr、Cu、Ni、Mn、V含量最高的是旱田,其次草地,水田和未利用地土壤重金属含量较低;对比七五大庆市土壤重金属含量发现,除V外,其余含量都有所增加,以Hg、As ...
赵淑苹, 陈立新
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Review of Policy Research, Volume 42, Issue 6, Page 1509-1524, November 2025.ABSTRACT This paper provides a retrospective on California's oversight of 1,3‐dichloropropene (1,3‐D). It utilizes archival documents, including internal memos, emails, and risk assessments, to demonstrate how the state's Department of Pesticide Regulation consistently expanded allowable 1,3‐D use while presenting each policy change as scientifically ...
Kaitlyn Alvarez Noli
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Huli yanjiu, 2008 摘要： （免费在线浏览）消毒供应室是医院的消毒供应中心,是医院的“心脏”，在控制医院感染中发挥着不可忽视的重要作用。由于工作性质和工作场所的特殊性，工作中存在着许多危害护理人员健康的有害因素，对这些有害因素采取必要的防护措施，既可以避免护理人员自身遭受危害因素的侵袭 ...
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Shuitu Baochi Xuebao, 2005 通过土壤追施Cd ,Cu和生物有机肥,研究了重金属对红富士苹果根区微生物的危害以及生物有机肥减轻重金属对土壤微生物危害的效应。结果表明:施用生物有机肥后,果园根区土壤细菌、真菌和放线菌数量显著增加,细菌占绝对优势;土壤Cd浓度在10 30mg/kg范围内,随Cd浓度的增加,细菌数量大幅度减少;Cu元素对土壤微生物的危害情况与Cd相似,但程度比Cd轻;从生物有机肥中提取的有机质对Cd和Cu有明显的吸附作用,在pH值6～8的范围内,吸附率随pH升高而提高;在中性微酸的条件下(最适宜苹果栽培的土壤酸碱条件) ,
张连忠 路克国 王宏伟 杨洪强 冯立娟 杨吉华
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四川大学学报. 自然科学版, 1992 应用显性致死试验方法来检测3种昆虫病毒(EpNPV、DtGV、DpCPV)对哺乳动物性细胞的致灾变性,以期全面评价3种昆虫病毒的“潜在性危害”.研究结果表明,EpNPV、DtGV、DpCPV对雄性小白鼠的生殖细胞无致突变作用,故不产生遗传性危害。
杨志荣 +3 more
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Zhongguo shiyan zhenduanxue, 2011 糖尿病（DM）是严重危害人类健康的疾病,成为继肿瘤、心脑血管疾病后第3位严重危害人民健康的慢性非传染性疾病,是世界各国所日益关注的公共健康问题。世界卫生组织（WHO）推荐的糖尿病诊断标准:空腹血糖（FPG）≥7.0 mmol/L ...
王炜, 陈晓萌, 金晔
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