窗口的右上角一般有三个小按钮，分别为最小化按钮、最大化按钮或还原按钮、关闭按钮。
参考答案：对
When he was young, he used to ________ hard at his lessons. [ ]
A. devote to working
B. devote himself to work
C. be devoted to work
D. be devoted to working
在下列字符中，其ASCII码值最小的一个是
A) 9 B) p C) Z D) a
