题干
—________ there any milk at home?
—No, but there ________ some cups of tea on the table.
A：Is; is
B：Are; are
C：Is; are
答案(点此获取答案解析）
C
④市场调节具有滞后性，国家必须及时干预
，若升降机以加速度g向下做匀加速运动时，以下关于物体受力的说法中正确的是( )