共查询到6条相似文献,搜索用时 31 毫秒
1.
2.
3.
4.
千年木:千年木也称作巴西铁树,它因富有魅力的外形和对办公室昏暗干燥环境有很强的适应能力,受到室内设计师们的喜爱。只要对它稍加关心,它就能长时间生长,并带来优质的空气。在抑制有害物质方面,其他植物很难与千年木相提并论。它的叶片与根部能吸收二甲苯、甲苯、三氯乙烯、苯和甲醛,并将其分解为无毒物质。光照条件:中性植物,适合种植在半阴处。 相似文献
5.
6.
Beck J 《Evaluation review》1998,22(1):15-45
Through comparative socio-historical analysis of American school-based drug education, this review critically examines past perspectives and practices and how they shaped current programs. Among the key findings emerging from this analysis: Contrary to the popular belief that drug education began in the 1960s, its roots actually go back at least 115 years to the advent of compulsory temperance instruction. Although the particular substances targeted by such approaches have changed, the underlying approaches and dominant "no-substance-use" injunction has not. Despite the existence of "informed choice" approaches, throughout much of this period, evaluation efforts continue to be constrained by the limited dictates of "no-use" perspectives. A pragmatic alternative to contemporary "Just Say No" education is offered that strives to minimize potential harm resulting from the uninformed misuse of licit and illicit substances. A unique evaluative strategy designed to assess the effectiveness of this form of "informed choice" or "harm reduction" drug education is discussed. 相似文献