违法行为就是指法律规定不能做而去做的行为。( )
如图,工人师傅砌门时,常用木条EF固定长方形门框ABCD,使其不变形,这样做的根据是____ .
John: What do you do on Sundays?
Tom: I read books and watch TV. What do you do on Sundays?
John: I do my homework . What about you, Mary?
Mary: I clean my room and watch TV.
John: You're helpful.
大禹治水曾三过家门而不入,他所治的“水”是指( )