问题
选择题
We live in an age _____ more information is available with greater ease than ever before. [ ]
A. why
B. when
C. to whom
D. on which
答案
答案：B
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We live in an age _____ more information is available with greater ease than ever before. [ ]
A. why
B. when
C. to whom
D. on which
答案：B
若将f（x）展开成傅里叶级数，则该级数在x=--π处收敛于（）。