⑴Where is the eraser? ____
⑵Where are the crayons? ____
⑶Put your book on your desk. ____
A.OK!
B.It's under your pencil box.
C.They're in my hand.
一元二次方程x2-5x-6=0的根是( )
嫁接好的植物,要用透明塑料袋罩住,目的是 ( )
阴影部分的面积是24平方厘米,E、F分别是AB和BC的中点,平行四边形ABCD的面积是____ 平方厘米.