一堆煤,用去了20吨,余下的是用去的25%,这一堆煤一共多少吨?
20+20×25%,
=20+5,
=25(吨);
答:这一堆煤一共有25吨.
Over the past 20 years, the Internet has helped change our world in ___________ way or another for the better.[ ]
A. any
B. one
C. every
D. either
使图形能自动按控件大小而改变的控件是( )。
A.图片框
B.图像框
C.标签框
D.框架