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【简答题】
关于国际多式联运经营人的性质,对于货主来说,他是_____,对实际承运人来说,他是_______。
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【简答题】A.They will have to take even larger doses. B.They will become physically impaired. C.They will suffer from minor discomfort. D.They will experience a very painful process.
【简答题】Some students believe that whether they have much money or large possessions, they will be happy. They believe that they will be able to do anything they wanted to do if they have money. Some students...
【简答题】质量摩尔浓度为b的KCl、K 2 SO 4 、CuSO 4 及LaCl 3 的水溶液的离子强度分别为I(KCl)=(); I(K 2 SO 4 )=(); I(CuSO 4 )=(); I(LaCl 3 )=()。
【简答题】(1)两个同容积的密封容器A、B,常温下,A中充入a g A气体,B中充入a g CH 4 气体,A与B内的压强之比是4:11,则A的摩尔质量为______. (2)某氯化镁溶液的密度为d g/cm 3 ,其中镁离子的质量分数为w,a mL该溶液中Cl - 的物质的量为______. (3)标准状况下VL氨气溶解在1L水中(水的密度近似为1g/mL),所得溶液的密度为ρ g/mL,则该溶液的溶质的...
【单选题】下列说法正确的是
A.
只有在标准状况下22.4L的任何气体才含有N A 个分子
B.
将25g胆矾晶体溶于1000mL水中,所得溶液中CuSO 4 的物质的量浓度为0.1mol/L
C.
气体摩尔体积就是22.4L/mol
D.
标准状况下,11.2LNH 3 含有的电子数约为5 N A
【单选题】What will they do?
A.
They will have an evening party.
B.
They won't have m evening party.
C.
The woman will but the man won't.
【简答题】A.They will go to the Grill. B.They will go to the library. C.They will go swimming. D.They will walk home.
【单选题】What will be one effect of the new biotechnology on plants?
A.
They will grow anywhere in the world.
B.
Some will be able to grow in salty soils.
C.
They will become poisonous to pests.
D.
Using nitrogen from the air they will be able to cress fertilize.
【简答题】(8分)(1)两个同容积的密封容器A、B,常温下,A中充入a g A气体,B中充入a g CH 4 气体,A与B内的压强之比是4∶11,则A的摩尔质量为_________________。 (2)某氯化镁溶液的密度为d g/cm 3 ,其中镁离子的质量分数为 w , a mL该溶液中Cl - 的物质的量为 。 (3)标准状况下VL氨气溶解在1L水中(水的密度近似为1g/ mL),所得溶液的密度为ρ...
【单选题】质量摩尔浓度为m的CuSO 4 水溶液,其离子平均活度 与离子平均活度系数 及m之间的关系为
A.
= · m
B.
= 4 · m
C.
= 4 · m
D.
= 2 · m
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