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【单选题】
--What a nice dress! How long _____ you _____ it? Just 2 weeksA.
will, buy
B.
did, buy
C.
are, having
D.
have, had
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【简答题】SWOT是指 、 、 、 。
【简答题】SWOT是指 、 、 、 。
【简答题】Infrared radiation can produce heat________
【单选题】-- What can trees do _________ us ? --- They can _________ harmful gases and produce oxygen .
A.
helping , take in
B.
to help , take in
C.
helping , take out
D.
to help , take care
【单选题】Missouri can produce 10,000 tons of pecans per year or 5,000 tons of pears per year. Washington can produce 12,000 tons of pecans per year or 48,000 tons of pears per year. Which of the following stat...
A.
Washington has an absolute advantage in the production of both pecans and pears.
B.
Washington has a comparative advantage in the production of both pecans and pears.
C.
Washington has a comparative advantage in producing pecans and Missouri has a comparative advantage in producing pears.
D.
Both answers A and C are correct.
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