利用鼠标若选不连续多个文件时，先按住（）键，然后在逐个单击要选择的各个文件。
A.ctrl+A
B.ctrl
C.shift
D.空格
参考答案：B
1，5，14，30，55，（ ）…（ ）
A．91
B．74
C．75
D．125
Most people agree that the present role of women has already affected U,S. society. ______, it has affected the traditional role of men.
A. Above all B. In all C. At most D. At last
