题干
Playing computer games too much is bad _______ your eyes.
A：at
B：for
C：of
D：in
答案(点此获取答案解析）
B
Playing computer games too much is bad _______ your eyes.
A：at
B：for
C：of
D：in
关叙述，正确的是（ ）
在区间
上的最大值为
, 则
等于( )