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【多选题】
Which of the following statements of economic zones are true? _______A.
At the beginning of the Opening up, five economic zones were set up.
B.
They set up these experimental zones near Hong Kong and Macau.
C.
They permitted market forces to operate in those zones, but not elsewhere in the country.
D.
Hong Kong took advantage of the cheap labor available on the mainland, and move their production facilities into these special zones.
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【简答题】鸟类唯一的皮肤腺是()。
【简答题】课程标准是教材编写的依据，教材是课程标准最主要的载体。
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