已知:如图,在△ABC中,AB=AD=DC,∠BAD=30°;试求∠B和∠C的度数.
A: Excuse me. Is there a ____ near here?
B: Yes, there is.
A: Where is it?
B: It's ____the science museum.
A: Is it____
B: No, it isn't. Go straight to the first crossing and then turn ____
A: OK. I'll ____there. Thanks.
东东练习投篮,第一次投中了3个,第二次投中了9个,两次一共投中了( )个。