下列属于缓慢氧化的是( )
A.食物腐烂
B.纸张燃烧
C.光合作用
D.酿酒制醋
AD
-Have you finished decorating your new house?
-No.It still needs a lot of work,but________the kitchen and the living room are finished.[ ]
A.at most
B.in all
C.in a word
D.at least
何时旅客氧气面罩会自动放下()
A.当飞机高度高于14,000英尺
B.当客舱高度高于14,000米
C.当客舱高度高于14,000英尺