Jack is discussing the game with his friends when I get there.
A:talking about
B:taking part in
C:lighting up
D:learning about
____手____赞 喜____自____ 天造____
伸____缩____ ____挠腮 ____倦____疲
②如图2,在梯形ABCD中,AB∥DC,DB⊥AD,AD=DC=BC=2cm,那么梯形ABCD的面积是____.
③如图3,在梯形ABCD中,DC∥AB,AD=BC,BD平分∠ABC,∠A=60°.则∠ABD的度数为____;若AD=2,则对角线BD的长为____.
“四大名著”是我国古典小说中的经典。小崔想了解关于魏、蜀、吴之问争斗的故事,他应选读的是( )