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【单选题】
2 mol.L-1下列溶液加水稀释2倍后,pH变化最小的是A.
HNO3
B.
HAc
C.
H2SO4
D.
HCl
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举一反三
【单选题】Utopia: Euphoria. This is Utopia. Visibility at Dixieville is 500m. Visibility is expected to increase to 1500m, in next two hours. Present visibility is m. Visibility is expected to
A.
800, decrease to 200m
B.
2000, decrease to 500m
C.
500m, increase to 1500m
D.
50m, increase to 500m
【单选题】S1:M.V. Helper, this is M.V. Blue Whale. What is the result of search? Over.S2:M.V. Blue Whale, this M.V. Helper. Sighted persons in water in position 47°N 050°W. Over.S1:M.V. Helper, this is M.V. Bl...
A.
Because they have rescued all survivors.
B.
Because they connot rescue more survivors.
C.
Because they survivors are in bad condition.
D.
Because they hope to return as soon as possible.
【单选题】S1:M.V. Helper, this is M.V. Blue Whale. What is the result of search? Over.S2:M.V. Blue Whale, this M.V. Helper. Sighted persons in water in position 47°N 050°W. Over.S1:M.V. Helper, this is M.V. Bl...
A.
Having located a lifeboat.
B.
Having sighted a lifeboat.
C.
Having sighted persons in a lifeboat.
D.
Having sighted persons in water.
【简答题】Is m＞0? (1) |m|/2=2 (2) m3=
【单选题】Utopia: Gargantua. This is Utopia. Visibility at Oredock is 50m. Visibility is expected to increase to 500m, in next four hours. Present visibility is m. Visibility is expected to
A.
800, decrease to 200m
B.
2000, decrease to 500m
C.
500m, increase to 1500m
D.
50m, increase to 500m
【单选题】影响会计等式总额发生变化的经济业务是( )。
A.
以银行存款150000元购买材料
B.
结转完工产品成本140000元
C.
购买机器设备200000元,货款未付
D.
收回客户所欠的货款80000元
【单选题】Utopia: Androcles. This is Utopia. Visibility at Appleport is 2000m. Visibility is expected to decrease to 500m, in next four hours. resent visibility is m. Visibility is expected to
A.
800, decrease to 200m
B.
2000, decrease to 500m
C.
500m, increase to 1500m
D.
50m, increase to 500m
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