有關Acollegeteacheronceg的精選知識
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Acollegeteacheroncegavealivelyclasstohisstudents. Heb...
問題詳情:Acollegeteacheroncegavealivelyclasstohisstudents. Hebeganbyholdingupaglass(1)somewaterinit.Hehelditupforalltosee,andaskedthestudents,"(2)doyouthinkthisglassweighs?" "50g!""100g!""125g!...