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问答题

Their __________ was to find out what percentage of the files on each of the computers had not been accessed since their creation.
 in place           conventional          mitigate           confer
 intervene          legitimate            intent              ploy

单项选择题

“所有鸟（Bx）都会飞（Fx）”这一命题的逻辑形式，可用谓词公式刻画为（∀x）（Bx→Fx）。（ ）

A．对
B．错