Your conclusion is ____ ____ imagination rather than facts.
____ A.cow B. horse C. sheep D. animal
____ A. pig B. litter C. throw D. open
____ A. zoo B. farm C. great D. school
____ A. moo B. tiger C. quack D. neigh
____ A. duck B. cows C. horses D. pigs
如图所示,一物体沿直线运动的v﹣t图象,根据图象可求出物体在0﹣3s时间内的位移为____m.
下列全是绿色开花植物生殖器官的一组是( )
有关经线的叙述正确的是