A:肱二头肌舒张,肱三头肌收缩
B:肱二头肌收缩,肱三头肌舒张
C:肱二头肌,肱三头肌都收缩
D:肱二头肌,肱三头肌都舒张
-- ____ (How/What) is Kitty?
-- She is tired and hungry.
下列不属于东北的省级行政区是( )