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【单选题】
卷柏又名“九死还魂草”， 它极耐干旱，能“死”而复生，具有顽强的生命力。它的繁殖方式是
A.
分裂生殖
B.
孢子生殖
C.
种子生殖
D.
有性生殖
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【单选题】Water Resource Humanity uses a little less than half the water available worldwide. Yet occurrences of shortages and droughts (干旱) are causing famine and distress in some areas, and industrial and agr...
A.
build big lakes to store water
B.
construct big pumping stations
C.
build small and cheap irrigation systems
D.
channel water from nearby rivers to cropland
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【单选题】Water Resource Humanity uses a little less than half the water available worldwide. Yet occurrences of shortages and droughts (干旱) are causing famine and distress in some areas, and industrial and agr...
A.
build big lakes to store water
B.
construct big pumping stations
C.
build small and cheap irrigation systems
D.
channel water from nearby rivers to cropland
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