【简答题】Do you have a Teddy Bear? The lovable teddy bear _____be found all around the world. You can find _____not only in toy stores, _____ on T-shirts, posters and more. Do you know _____ the teddy bear got...
【简答题】判断题(判断对错) (1) -7x y 2 的系数是7;______ (2) - x 2 y 3 与 x 3 没有系数;______ (3) -a b 3 c 2 的次数是0+3+2;______ (4) - a 3 的系数是-1;______ (5) - 3 2 x 2 y 3 的次数是7;______ (6) 1 3 π r 2 h 的系数是 1 3 .______.