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【单选题】
在人类历史上最早专门论述教育问题的著作是A.
《》
B.
《论语》
C.
《论演说家的教育》
D.
《理想国》
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举一反三
【单选题】He looked rather untidy as there were two buttons _____ from his coat.
A.
loosing
B.
losing
C.
off
D.
missing
【单选题】It was surprising that the hotel looked rather shabby outside was luxuriously and ______ furnished inside.
A.
artificially
B.
arrogantly
C.
arbitrarily
D.
artistically
【单选题】It was surprising that the hotel that looked rather shabby outside was luxuriously and ______furnished inside.
A.
artificially
B.
arrogantly
C.
arbitrarily
D.
artistically
【简答题】已知边长为a的等边三角形内任意一点到三边距离之和为定值，这个定值为 ，推广到空间，棱长为a的正四面体内任意一点到各个面的距离之和也为定值，则这个定值为：
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