何谓“法”？
参考答案：
将药物置沸水中浸煮短暂时间，取出，分离种皮的方法称为法。
How many cities _____ the Greens _____ since they came to China last week? [ ]
A. have; traveled
B. has; traveled
C. have; traveled to
D. has; traveled to
什么是伴生矿？
