番茄的病害较多，为了防止病害，必须与茄科以外的其它蔬菜进行轮作，轮作年限一般为多少？
参考答案：
3-5年
Honesty is the most important______ a man can have.
A．habit
B．manners
C．quality
D．effect
Why are the private lands surrounding Glacier National Park so important a. They function as a hunting preserve. b. They are restricted to government use. c. They are heavily populated. d. They contain natural habitats of threatened species.
