问题
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The author and other three people conducted an experiment, trying to live without their mo
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Environment is to us what water is to fish—on no ______ can we live without it!A.propertyB
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______ can be used independently without being combined with other morphemes.A.Free morphe
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A study at the University of Maryland finds that studentsA.can"t live a day without electr
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Unlike any other creature on this planet, humans can learn and under stand, without havin
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Living things can also do many other things that non-living things cannot do. Living thing