下列资源管理中，实行总量控制与定额管理相结合机制的是( )；
A．土地资源管B．矿产资源管C．水资源管理D．海洋资源管理
参考答案：C
.
Too much drinking and smoking ________ his early death. Which of the following keys is wrong?
A．resulted in
B．led to
C．contributed to
D．brought with
4，3，8，21，160，( )。
A．3339
B．3200
C．1280
D．1920
