A:△ADE∽△ABC
B:△ADE∽△ACD
C:△ADE∽△DCB
D:△DEC∽△CDB
下列函数中是二次函数的有( )
①y=x+1x;②y=3(x﹣1)2+2;③y=(x+3)2﹣2x2;④y= 1x2+x.
妈妈从上午11:00开始做饭,12:10做好,共用了多长时间?
— Oh, dear. That depends on it will be fine tomorrow.