A:飞行、爬行
B:跳跃、爬行
C:跳跃、游泳
D:飞行、游泳
—Will you stay for supper with us?
—Sure, I'd love to. Home cooking is just what I like.
设a→=32,1+sinα,a→=1-cosα,13,且a→∥b→,则锐角α为( )