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    23、All substances,         solids, liquids, or gases, are made up of entirely atoms.

           A．no matter what they                             B．whether

           C．no matter what are they                        D．whether are

     

     

    23、B

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    All substances,         solids, liquids, or gases, are made up of entirely atoms.

           A．no matter what they                             B．whether

           C．no matter what are they                        D．whether are

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