情景交际从右栏中选出左栏的正确应答语。
①How do you spell “map”?____ A. Yes, I am.
②Please give me the book.____ B. M-A-P, map.
③Let me help you!____ C. Here you are.
④Are you Jane? ____ D. I am a teacher.
⑤What do you do? ____ E. Thank you.
求角的度数.(如图)∠1=30°,∠2=____度,∠3=____度.