下侧是西汉初年郡国并行示意图(局部)。为消除图中反映的威胁兵权的因素,汉武帝( )
A:实行“削藩”
B:推行分封制
C:颁布“推恩令”
D:宣布“罢黜百家,独尊儒术”
在△ABC中,若a=2,b=23,B=60°,则角A的大小为( )
一Would you like swimming with me?
一Sorry,I have much homework to do.