燕子：春天（）
A．知了：夏天
B．山鸡：高原
C．蟋蟀：冬天
D．白药：云南
参考答案：A
解析：
燕子是春天的象征，知了是夏天的象征。故选A。
As we know, paper is made ________ wood , that is to say wood is made ______ paper.
A．of, from
B．in, into
C．from, into
D．from, by
柔是相对刚而言，这句话怎样理解？
