摘要
The Professor began his class by holding up a glass with some water in it.He held it up for all to see and asked the students"How much do you think this glass weighs?""50gms!"..."100gms!"..."125gms"...the students answered."I really don’t know unless I weigh it,"said the professor,"but,my question
The Professor began his class by holding up a glass with some water in it.He held it up for all to see and asked the students＂How much do you think this glass weighs？＂＂50gms!＂...＂100gms!＂...＂125gms＂...the students answered.＂I really don＇t know unless I weigh it,＂said the professor,＂but,my question is：What would happen if I held it up like this for a few minutes？＂
