单项选择题

Apple was the first to make popular ______.

A．Windows operating system
B．a graphical user interface
C．the use of icons
D．the use of personal computer
<上一题 目录 下一题>
热门 试题

单项选择题
According to the findings by the American researchers, what is of help in relieving patients’ pain and worry
A．Brain.
B．Skin.
C．Medicine.
D．A sharp needle.
填空题
subtle
相关试题