电器元件布置图图中往往留有（）的备用面积及导线管的位置，以供改刊设计时用。
A.10%以上
B.5%以上
C.20%以上
D.30%以上
参考答案：A
With a basket on her back, the little girl is walking along the stream with green grass and red flowers ____ on both sides.
A．to grow
B．grown
C．growing
D．being grown
常用的液化石油气钢瓶按充装量分有几种。
