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【单选题】
[Based on Table 5-2] Using the midpoint method, if the price falls from $40 to $20, the absolute value of the price elastic-ity of demand isA.
20.
B.
10.
C.
2.33.
D.
0.43.
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举一反三
【单选题】The pretty girl is always busy helping her mother with the housework _________ I go to visit her family.
A.
every time
B.
every time when
C.
at every time
D.
however time
【单选题】-I saw Jane and her mother in the shop around eight yesterday evening. -Impossible. She TV with me in my home then.
A.
is watching
B.
was watching
C.
has watched
D.
had watched
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