Criticized as online games are,they never fail to________a large number of teenagers.
A:appeal to
B:object to
C:refer to
D:turn to
已知△ABC的三边长分别是a、b、c,且a、b、c的值满足等式|b+c﹣2a|+(b+c﹣5)2=0.
(1)写出a的值;
(2)用含b的代数式表示c;
(3)求b的取值范围.
下列植物中,具有根、茎、叶的是( )