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【单选题】
向右下方倾斜的线性需求曲线是A.
缺乏弹性的
B.
单位弹性的
C.
富有弹性的
D.
在一些点缺乏弹性，在另一些点富有弹性
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反馈参考答案：
举一反三
【单选题】Do you ever have any trouble ______ the obscure path through the forest?
A.
to find
B.
finding
C.
be found
D.
founded
【单选题】Do you ever have any trouble____your way in a strange city?
A.
to find
B.
with finding
C.
findi ng
D.
to finding
【单选题】Do you ever have any trouble ______ the obscure path through the forest?
A.
to find
B.
finding
C.
with finding
D.
to be find
【简答题】Have you ever played any sports? / What sports do you like?
【单选题】C. Choose the best answer to complete each sentence. 5. Do you ever have any trouble ___ the obscure path through the forest?
A.
to find
B.
finding
C.
with finding
D.
to finding
【单选题】Do you ever have any trouble ______ the obscure path through the forest?
A.
to find
B.
finding
C.
with finding
D.
to finding
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