硝酸银滴定法测定水中氯化物时,为何不能在酸性介质或强碱介质中进行?

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问题:

硝酸银滴定法测定水中氯化物时,为何不能在酸性介质或强碱介质中进行?

考点:环境科学技术及资源科学技术环境监测环境监测题库
题型:问答题 简答题
Tom is a middle school student. He is studying in Grade 7. He usually     at 7:00 o’clock in the morning.       today he gets up at 6:30 and goes to buy a big       . After that he helps his grandparents clean their room, because it is his         birthday. His grandpa is going to be 68 years old.
Tom      two CDs about Beijing Opera(京剧)      his grandpa. He is sure his grandpa would like      very much, because his grandpa        listening to Beijing Opera.
When Tom        home at noon, his mother is making        with grandma. They are laughing and talking about something         . His grandpa is drinking tea         listening to Beijing Opera.
Tom says, “Happy birthday to you, grandpa.” Then he        the big cake and gives grandpa a         piece. Grandpa is very happy and eats it.
In the evening, Tom watches TV with his grandparents together. He is a little        but very happy, because he can make his grandparents happy.
小题1:
A.goes to schoolB.gets upC.watches TVD.goes to bed
小题2:
A.ButB.BecauseC. SoD.Or
小题3:
A.FlowerB.cardC.cake D.book
小题4:
A.mother’sB.father’sC.grandpa’sD.grandma’s
小题5:
A.seesB.listens toC.watchesD.buys
小题6:
A.toB.forC.withD.at
小题7:
A.itB.herC.them D.him
小题8:
A.enjoysB.practices C.wantsD.would like
小题9:
A.getsB.buysC.leaves D.goes to
小题10:
A.cakesB.noodlesC.fruitsD.drinks
小题11:
A.unhappilyB.healthilyC.luckilyD.happily
小题12:
A.orB.butC.andD.so
小题13:
A.cutsB.throwsC.playsD.puts
小题14:
A.lightB.badC.small D.big
小题15:
A.sadB.tiredC.worriedD.excited
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三衢沈君持正,盛称其守白侯①之贤。予问之曰:“侯定科繇②如何?”曰:“豪者善避役,役多在贫人。侯察其 * * ,以田定赋③,一州服其平。”“侯律己何如?”曰:“侯清约甚,饮衢水外,一物不烦衢民。每旦徒行入府署,野夫不识,与争道,不问④。”“侯驭吏何如?”曰:“吏抱案立左右,唯侯言是裁,不敢以意出入之。去年春,天子嘉之,衢人咸为侯荣。”予问已,顾谓二三子曰:“昔予闻兰溪吴德基言若此,今持正又盛称其贤。白侯之贤信已。”                 (选自明代宋濂《书白衢州》,有删减)

【注释】①白侯:指白景亮,字明甫,时任衢州路总管。②繇(yáo):徭役。③赋:税。④问:问罪,责难。

小题1:解释下列句中加点词的意思。(2分)

①豪者避役     善:                   ②白侯之贤已 信:      

小题2:用“/”标出下面句中的两处停顿。(2分)

昔予闻兰溪吴德基言若此

小题3:请在下面横线处各填上一个恰当的字,概括白侯之贤,并在原文中用“      ”画出能体现“律己清”的语句。(3分)

察 * * 明,定赋平,衢人    之;律己清,驭吏      ,天子嘉之。

题型:问答题 简答题

化脓性关节炎后期关节已有破坏与增生,强直已不可避免时,最恰当的治疗方法是

A.避免负重

B.加强活动

C.固定于功能位

D.行关节融合术

E.物理疗法

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在“是以脾胃之论出于东垣则无弊,若执东垣以治者,未免以燥剂补土”中,“执”之义为()

A.同"势"

B.持

C.用

D.行

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在两台远程路由器之间抓取报文,发现数据包由lP头部、ESP头部以及被加密后的数据组成。则该数据包有可能经历如下哪些过程()。

A.GRE overIPSec,IPSec采用传输模式

B.GRE overIPSec,IPSec采用隧道模式

C.IPSec over GRE,IPSec采用传输模式

D.IPSec over GRE,IPSec采用隧道模式

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