如图,⊙O的直径AB=4,点C在⊙O上,如果∠ABC=30°,那么AC的长是( )
A:1
B:2
C:3
D:2
Has he ____(安排) for a car to pick them up from the airport?
形近字组词。
淡____ 傍____ 识____
谈____ 旁____ 织 ____