He turned ______ the radio because his father was asleep. [ ]
A. on
B. down
C. up
D. over
答案:B
商品的价值量是由生产商品的个别劳动时间决定的。( )
近端关键点包括()。
A.头部
B.肩峰
C.骨盆
D.下肢
E.拇指