⑴What did you do yesterday?____ A. I am going to play basketball.
⑵What are you going to do?____ B. I am playing football.
⑶What are you doing now? ____ C. I played pingpong.
如图,在Rt△ABC中, ∠C=90,AB=5,AC=3,则sinB的值是
下列哪个不是台湾省的美称( )