point-source pollution ,nonpoint-source pollution是什么意思

相关推荐

• Air pollution is more serious than water pollution.的意思?
• 英语高手进,帮我看看文章大致意思(2)A number of recent books have reworked subjects,forms and writing techniques.Today's children read stories about divorce,death,drugs,air pollution,political extremism and violence.Relying on the magic of the illustrator,all kinds of books are being published.Before they know to read,babies can play with books made of cloth or books made to take in the bath.Later on,they are given picture books that may be cubical(立方形的)or triangular,
• 改写句子在改写后的句子空格处填上适当的单词,使改写后的句子意思在含义上与原局相同.每空限填一词.1/Many people think that it is possible to reduce pollution in this area.Many people think ______ ______to reduce pollution in this area.2/Your clothes need washing.Your clothes need _____ _____ ______.3/You shouldn't speak to others until you are spoken to.You shouldn't speak to others until____ _____ .4/The house which was completed last year fell down last week in a heavy storm.The house ______last ye
• 经济学中规范表述和实证表述的问题 positive statements and normative statements两者的区别是什么呢?1.pollution control is effective through a system of fines.2.any strategy aimed at reducing factory closures in deprived area would be helpful.这两个statement属于实证表示还是规范表述呢?抱歉没有悬赏, 在国外初学经济 实在是有点confused
• 几道初中英语单选1.……It is sure that if there are fewer people _____(to drive或driving),there will be less air pollution.添哪个?有什么区别2.The evonomic slowdown has made it _____(much或far）more difficult for them to find a job.同上,差别是什么啊?3.It is such____(an或无）important time for you to learn knowledge for the future.TIME这里可数?4.It is important for us to keep a good relationship ____(among 或between)classmates.这算几者?不是大于2吗5.I am doing with the machine that i had _____(it rep
• 4道英语选择题,最好也解析,1、if you want to talk with others in english you must practice your ———— firstA pollution B population C punctuation D pronunciation2、dont‘t make so much noise The children—— an english lessonA have B had C has3、i don not know the new wordyou can——in the 词典A look up it B look it up C look for it D look it for4 tom不知道单词的意思,so he went to ask the 老师——A ofB toC withD for
• "我认为我们在保护环境不受污染(pollution)方面还做得不够."这句话翻译成英语是什么
• sometimes people pollution the enyironment什么意思?
• pollute pollution 词性分别是什么?
• vessel-source pollution是什么意思
• 落后,单词多少
• 已知a.b为锐角,且满足3sin^2a+2sin^2b=0.求证a+2b=π/2