选答语。
①What's your name? ____ A. I'm from China.
②Where are you from? ____ B. He's my grandpa.
③Who's that man?____ C. My name is Tutu.
“红豆生南国,春来发几枝”描述的是哪种生命现象( )
想:先算6加7得____;再把30和____合起来,得____.
(先填 ,再从左到右填写括号)
寒潮对农作物危害最大的季节是 ( )