A:30°
B:40°
C:50°
D:60°
As teenagers, we're old enough ________ with housework. We can help set the table, wash the dishes and clean our own rooms.
所有的鸟均具有( )行为.
现今,国家公务员招考一般采用笔试和面试相结合的方式。下列皇帝中亲自出题面试,首开殿试之举的是( )