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【单选题】
The point where the indifference curve is tangent to the budget lineA.
is the best affordable point.
B.
is where the marginal rate of substitution exceeds the relative price by as much as possible.
C.
is a point on consumer's demand curve.
D.
All of the above answers are correct.
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举一反三
【单选题】May I speak to Xiaofang? ______,please. I am going to ask her to come.
A.
Hold the line
B.
Don’t call
C.
Put down
【单选题】—May I speak to Mary? —________. I'll call her at once. [ ]
A.
Hold on, please
B.
She isn't in
C.
This is Mary
D.
I can take a message
【单选题】丁二酮(C 4 H 6 O 2 )可用作糖果增香剂。下列关于丁二酮的说法中正确的是
A.
丁二酮属于有机高分子化合物
B.
丁二酮中含有氧分子
C.
丁二酮中氧元素的质量分数最大
D.
丁二酮中氢元素的质量分数为6.98％
【简答题】下列关于丁香的说法正确的是( )A 来源于桃金娘科植物B略成研棒状C质坚实,富油性D气芳香浓烈,味辛辣,有麻舌感A. 1 B. 1 C. 1 D. 1
【单选题】The head nurse ______ to call the doctor.
A.
repeat
B.
determined
C.
records
D.
Immediate
【简答题】家庭体育的基本特征是人际关系的（）；（）；（）、差异性。
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