文物是鲜活的历史。下列文物中最能反映商朝社会生活的是

A．兵马俑  

B．司母戊鼎   

C．竹木简    

D．青花瓷

How should signal flares be used after you have abandoned ship and are adrift in a liferaft?（）.

A.Immediately use all the signals at once

B.Use all the signals during the first night

C.Employ a signal every hour after abandoning ship until they are gone

D.Use them only when you are aware of a ship or plane in the area