如果x= 56 y,那么x与y的比是5:6
— She _______ herself in the accident.
— Really? Do I need ________her?
真的猛士,____,敢于正视淋漓的鲜血。(《记念刘和珍君》)
下列能说明生物能对外界刺激作出反应的是( )