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【单选题】
-Are you Maria? -______.A.
Yes, I are
B.
No, I am
C.
Yes, I am
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举一反三
【简答题】A2 图幅的幅面尺寸b×L为: ;A3 图幅的幅面尺寸b×L为: 。
【简答题】A．Why the book talks about turbidity currents. B．How winds can affect some ocean currents. C．The causes of underwater earthquakes. D．What a turbidity current is.
【单选题】Using the arc method, what is the price elasticity of demand of product X as price falls from its curren price of $20 to a new price of $10, and the quantity from 15 to 25.
A.
0.75
B.
1.33
C.
0.5
D.
2
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