A:Hello!
B:Hi!
A:Is this your ____?
B:Sweater? Oh, ____! This is my sweater.
A:It's____!
B:Thank you.
A.nice B.sweater C.yes
—Yes, I agree you.
已知向量a→=(3,1),向量b→=(sinα-m,cosα)α∈R,且a→∥b→,则m的最小值为( )
下列加线成语使用正确的一项是( )