根据句意及汉语提示完成单词
①Miss Gao and her family are____(普通的)people.
②Can you ____(描述)your father's personality?
③He is reading a____ (小说) in the library.
④Yang Mi is a famous____(女演员).
⑤This____ (茶馆) looks cleaner than that one.
用电____制作电磁铁。(填“可以”或“不可以”)
把蜗牛、海葵、蜘蛛分为一类,把锦蛇、青蛙、麻雀分为一类,这是依据( )
如图所示,A为静止于地球赤道上的物体,B为绕地球沿椭圆轨道运行的卫星,C为绕地球做圆周运动的卫星,P为B、C两卫星轨道的交点.已知A、B、C绕地心运动的周期相同,相对于地心,下列说法中正确的是( )