图中的立方体展开后,应是右图中的( )
A:
B:
C:
D:
Large amounts of food ______ wasted in our school everyday, but the poor in many countries ______ no access to drinking water.
P为△ABC所在平面外一点,平面α∥平面ABC,α分别交线段PA、PB、PC于A1、B1、C1,若PA1:A1A=2:3,则S△A1B1C1:S△ABC=____
影响日本樱花开放时间自南向北推迟的主要因素是( )