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【多选题】
在兑换货币时,如果你不想要太大面额的钞票,可以用下边类似的句子来表达:( )A.
No large bills,please.
B.
Please break this into smaller bills for me.
C.
I’d like some coins for this note.
D.
Do you have change for 100 pounds?
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【简答题】My classmate is much cleverer than I.
【单选题】25℃时，在0.01mol/L的稀硫酸中，水电离出的[H + ]是 [ ]
A.
5×10 -13 mol/L
B.
0．02mol/L
C.
1×10 -7 mol/L
D.
1×10 -12 mol/L
【单选题】某缓冲溶液 [HB] = [B - ] , 若 B - 的 K b = 1.0 × 10 -4 , 此溶液的 pH 是 ( )
A.
4
B.
5
C.
6
D.
8
E.
10
【单选题】25℃，在0.01mol?L -1 的硫酸溶液中，水电离出的H + 浓度是（ ）
A.
5×10 -13 mol?L -1
B.
0.02mol?L -1
C.
1×10 -7 mol?L -1
D.
1×10 -12 mol?L
【单选题】听力原文： Finally there is one more element to business success that we havent talked about. I know what you think Im going to say, luck and youre partially right. Good entrepreneurs know how to make thei...
A.
They drank from public water fountains.
B.
They passed around a cup of water.
C.
They drank from personal tin cups that they carried with them.
D.
They bought a paper cup of water.
【单选题】已知 K sp θ ( AB 2 ) = 4.2 × 10 -8 , K sp θ ( AC ) = 3.0 × 10 -15 在 AB 2 、 AC 均为饱和的混合溶液中, 测得 c ( B - ) = 1.6 × 10 -3 mol ·L -1 ,则溶液中 c (C - ) 为 ..... .............. ............................. ........
A.
1.8 ×10-13 mol ·L -1
B.
7.3×10-13 mol ·L -1
C.
2.3 mol·L -1
D.
3 .7 mol ·L -1
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