根据短文,判断正误。
Look at this desk. It's Jim's desk. It's brown. Jim's book is on it. It's an English book. His pencil-box is on it, too. His pencil is in his pencil-box. But where's his pen? He can't find it.
已知 y=m2-mxm2-2m-1+(m-3)x+m2是x的二次函数,求m的值和二次函数的解析式.
蚯蚓一般穴居生活,但夏季雨后蚯蚓在地面上活动,原因是( )
我国居世界首位的海洋资源是( )
《孟子·离娄上》说:“人有恒言,皆曰天下国家。天下之本在国,国之本在家,家之本在身”;《礼记·大学》说:“一家仁一国兴仁;一家让,一国兴让”。材料体现的理念是( )