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【判断题】
天然水中氧的主要来源是大气溶于水中的氧,其溶解量不随温度和压力变化。
A.
正确
B.
错误
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参考答案:
举一反三
【判断题】组织结构本质是为实现组织战略目标而采取的一种分工协作体系,组织结构必须随着组织重大战略的调整而调整。
A.
正确
B.
错误
【单选题】Both longitude and latitude ______ in degrees, minutes and seconds.
A.
measurin
B.
measured
C.
are measured
D.
being measured
【简答题】完形填空。 The best way of learning a language is always using it. The best way of learning 1 English is talking in English as much as possible. Sometimes  you'll get your 2 mixed up and people will not 3 ...
【简答题】往含有Cu2+、Fe3+和Mg2+(浓度均为0.1 mol/L)的溶液中加入过量铁粉,充分反应后,溶液中浓度最大的阳离子是 .
【单选题】如果溶液中 Fe 3+ 和 Mg 2+ 离子的浓度都是 0.1 mol·L -1 ,溶液的 pH 在什么范围使 Fe 3+ 定量形成氢氧化物沉淀 , 而与 Mg 2+ 加以分离 ? 已知 Ksp[Fe(OH) 3 ] = 2.79×10 -39 , Ksp{Mg(OH) 2 } = 5.61×10 - 12 。
A.
1.81 ~ 2.81
B.
8.00 ~ 9.01
C.
1.48 ~ 8.87
D.
以上都不对
【单选题】下列溶液中微粒的物质的量浓度关系正确的是(  )
A.
在FeCl 3 溶液中加入Mg(OH) 2 固体,溶液中c(Fe 3+ )下降
B.
CH 3 COOH溶液加水稀释后,恢复至原温度,溶液中c(OH - )和Kw都增大
C.
0.1 mol/L Na 2 CO 3 溶液:c(OH - )=c(HCO 3 - )+c(H 2 CO 3 )+c(H + )
D.
常温下,向0.01 mol/L NH 4 HSO 4 溶液中滴加NaOH溶液至中性:c (Na + )>c(NH 4 + )>c(SO 4 2- )>c(OH - )=c(H + )
【单选题】Both longitude and latitude ______ in degrees, minutes and seconds.
A.
measuring
B.
measured
C.
are measured
D.
being measured
【单选题】Longitude and Latitude The meridians of longitude are imaginary great circles drawn from pole to pole around the earth. By international agreement, the meridian of longitude passing through Greenwich,...
A.
his latitude
B.
his longitude
C.
local time
D.
both his latitude and longitude
【简答题】用方框中所给单词或短语的适当形式填空 happy, proud, laugh at, stay in touch, try one's best, wake up 1.They all ____________ to study hard in order to go to college one day. 2.My neighbour is moving away, but I hope tha...
【简答题】单词拼写。 l.  In China, people _____ (握手) when they meet. 2. It's not polite to _____ (顺便拜访) a friend's home. 3. Don't talk to him like that. He's a child ____ (毕竟). 4. I'm gradually _____ (习惯于) the table...
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