A teacher was giving her pu- pils a lesson on logic(逻辑)．“Here is the situation(情景),”she said,“a man is stand- ing up in a boat in the middle of a river,fishing．He loses his bal- ance(平衡),falls in,and begins splashing(泼水)and yelling(叫喊)for help．His wife hears the commotion(喧闹),knows that he can’t swim,and runs down to the bank (河岸)．Why did she run to the bank?” A girl raised her hand and asked,“To draw out(提取)all of his savings(存款)．” A teacher was giving her pu- pils a lesson on logic. “Here is the situation,” she said, “a man is stand- ing up in a boat in the middle of a river, fishing. He loses his bal- ance, falls in, and starts splashing ( Knows that he can not swim, and runs down to the bank .Why did she run to the bank? ”A girl raised her (shouting) for help .His wife hears the commotion (noise) hand and asked, “To draw out all of his savings.”