经度相同则地方时相同,日出时刻相同。( )
James plays _____ Miami Heat. He is going to play _______ the players in the Houston Rockets.
如图,OA⊥OB,∠BOC=30°,OD平分∠AOC,则∠BOD的大小是( )
把新鲜的柑橘装入塑料袋中密封不容易变干,说明( )