单选题：Dehydration may occur if there is a shortage of water______

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Dehydration may occur if there is a shortage of water______ A．0unces of Water Needed Per Day
B．Importance of Water
C．Composition of Water
D．Signs of Dehydration
E．Supply of Water
F．Necessity for Bringing a Bottle for Water

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Plants, animals and humans are all effective in_______A．our share of resources B

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