全球二氧化碳等气体的排放量不断增加会导致 [ ]
A．酸雨
B．温室效应
C．臭氧层破坏
D．皮肤癌增加
答案：B
某一中成药品的生产批号为990514，有效期为2年，则该药品可使用到
A．2001.5.15
B．2001.5.13
C．2001.5.12
D．2001.5.14
E．2001.6.1
It was years later that I was able to fully understand what role stamp collecting ______ in your life. [ ]
A. found
B. played
C. kept
D. provided
