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【单选题】
已知等差数列 与等比数列 各项都是正数，且 ， ，那么一定有（ ）A.
B.
C.
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皮皮学刷刷变学霸
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【简答题】微型计算机存储系统中，PROM是
【简答题】13. Cotton_____ in
the southeast of China.A. is grown B. are grown C. grows D. grow
【单选题】Which of the following is most likely to increase consumer surplus in the market for cotton T-shirts?
A.
. Weather conditions provide for an extremely productive cotton harvest.
B.
. Consumer incomes fall and cotton T-shirts are normal goods.
C.
. The price of polyester T-shirts falls.
D.
. The price of industrial sewing machines used to produce garments increases.