皮皮学，免费搜题
登录
搜题
【判断题】
小说中的描述多为作者亲生经历。()A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】Which of the following statements about the relationships between exposure routes of nanoparticles and their health risks are correct?
A.
Exposures to nanomaterials may occur through inhalation, dermal contact, accidental injection, & ingestion, the risk increases with duration of exposure & the concentrations of nanoparticles in the sample or air.
B.
Inhalation presents the lowest exposure hazard.
C.
Nanomaterials suspended in a solution or slurry pose a lesser hazard, however, sonication, shaking, stirring, pouring, or spraying can result in inhalation exposure.
D.
Nanoparticles that are fixed within a matrix pose the least hazard as long as no mechanical disruption, such as grinding, cutting, or burning, occurs.
【单选题】Nanoparticles are ___________________, so they can be difficult to work with.
A.
fullerence
B.
tiny
【简答题】nanoparticles
【多选题】清洁生产的特点包括( )。
A.
要站在战略层面的高度去认识它，对待它，强调实施的重要性、紧迫性
B.
坚持从源头抓起，实行关键点控制
C.
预防为主，想在前头，做在前头，把污染的程度减少到最低
D.
清洁生产是一个长期的运作过程
【单选题】What worries Consumers Union is that nanoparticles ______.
A.
linger in environment and are omnipresent in nature
B.
can enter the brain more easily than normal particles
C.
become essential components of cosmetics and food
D.
present in products may cause harm to human beings
【多选题】清洁生产的特点包括（）
A.
要站在战略层面的高度去认识它，对待它，强调实施的重要性、紧迫性
B.
坚持从源头抓起，实行关键点控制
C.
预防为主，想在前头，做在前头，把污染的程度减少到最低
D.
清洁生产是一个涉及面广、影响程度较大的问题
E.
清洁生产是一个长期的运作过程
【简答题】国家清洁生产推行规划应当包括:推行清洁生产的目标、主要任务和保障措施,按照资源能源消耗、污染物排放水平确定开展清洁生产的重点( )、重点( )和重点( )。
相关题目：