∵分式x+1x2是非负数，又x 2在分母上必须是正数，
∴x+1≥0，x≠0，
解得：x≥-1且x≠0．
故答案为：≥-1且x≠0．
— Did you enjoy yourself last weekend, Tom?
— Yes, as you know, ______ birthday party went on in ______ most pleasant atmosphere. [ ]
A. the; the
B. a; the
C. the; a
D. a; a
陶渊明辞去彭泽县令时所写的辞赋是（）
A.《归田赋》
B.《归去来兮辞》
C.《闲情赋》
D.《感士不遇赋》
