从括号中选择一个恰当的组词
(优 忧)____闷 致(蜜 密)____ (疆 僵)____硬 狂(怒 恕 )____
(玩 顽)____皮 锻(炼 炼)____ (拔 拨)____河 (座 坐)____位
“天苍苍,野茫茫,风吹草低见牛羊”的景观是指( )
选择正确的选项补全对话。
A. welcome
B. water
C. Thank
D. like
E. Here
Tom: I'm thirsty. Can I have some ____?
Amy: Sure. ____ you are.
Tom: ____ you. I'd ____ an egg, please.
Amy: Here you are.
Tom: Thanks.
Amy: You are ____.
如图,将△ABC沿DE折叠,使点A与BC边的中点F重合,下列结论中:①EF∥AB且EF=12AB;②∠BAF=∠CAF;
③S四边形ADFE=12EF•DE;④∠BDF+∠FEC=2∠BAC( )
下面的图形是由边长为1的正方形按照某种规律排列而组成的.