题目内容
（请给出正确答案）
[主观题]
The day I shall never forget is the one ______ I joined the Party.A．whichB．at whichC．on wh
The day I shall never forget is the one ______ I joined the Party.
A．which
B．at which
C．on which
D．in which
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A．节省空间
B．日常维护
C．散热
D．主设备调测
