酒吧
图片
软件
持久性有机污染物
污染物累积指数 accumulation index of pollutants
点击查看答案
Which three statements are true regarding persistent lightweight jobs?()A、 Persistent lightweight jobs modify several tables in the data dictionary to generate a lot of redo.B、 The user cannot set privileges on persistent lightweight jobs.C、 Persistent lightweight jobs are useful when users need to create a large number of jobs in a short time.D、 Persistent lightweight jobs are useful when users need to create a small number of jobs that run infrequently.E、 The use of a template is mandatory to create persistent lightweight jobs.
生物礁(organic reef)
下列有关POPs的说法,不正确的是()A、废旧电线和电子垃圾回收金属熔融时可生成PCDDs和PCDFsB、POPs可对包括肝、肾等脏器及神经系统、内分泌系统、生殖系统、免疫系统等产生急性和慢性毒性,并具有明显的致癌、致畸、致突变等作用C、POPs在低浓度时不会对生物体造成伤害D、我国已经开始对境内POPs污染状况进行全面调查和监测E、POPs可通过胎盘和授乳传递给胎儿和婴儿,从而影响其发育
POPs的“三致”效应为()、()、()。
Persistent Organic Pollutants,简称POPs,指的是:()。A、酒吧B、图片C、软件D、持久性有机污染物
持久性有机污染物(persistent organic pollutants pops )