若要从学生表中检索出jg并去掉重复记录，可使用如下SQL语句 SELECT______jg FROM student 请选出正确的选项完成该语句
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The criticism of Mr. Burrows toward the scheme implies that
A. he is very angry for many of his apprentices' failing in acquiring the NVQ certificates.
B. those who have physical defects can impossibly pass the exams for NVQ.
C. the apprentices who have got NVQ certificates always choose to leave for an other place.
D. NVQ is so difficult that he has to spend more time in teaching the youngsters.
The stories of Sarah Orne Jewett are considered by many to be more authentically regional
A. elegantly
B. genuinely
C. intentionally
D. thoroughly
数列{an}的前n项和为Sn，则S5＝5/6。
A. 条件(1)充分，但条件(2)不充分。
B. 条件(2)充分，但条件(1)不充分。
C. 条件(1)和(2)单独都不充分，但条件(1)和条件(2)联合起来充分。
D. 条件(1)充分，条件(2)也充分。
E. 条件(1)和(2)单独都不充分，条件(1)和条件(2)联合起来也不充分。
下列有关投资组合风险和报酬的表述正确的是（)。A．一项资产的期望报酬率是其未来可能报酬率的均值B下列有关投资组合风险和报酬的表述正确的是()。
A. 一项资产的期望报酬率是其未来可能报酬率的均值
B. 投资者不会把资金投资于有效资产组合曲线以下的投资组合
C. 除非投资于市场组合，否则投资者应该通过投资于市场组合和无风险资产的混合体来实现在资本市场线上的投资
D. 当资产报酬率并非完全正相关时，分散化原理表明分散化投资是有益的，原因在于能够提高投资组合的期望报酬率对其风险的比值，即分散化投资改善了风险-报酬率对比状况
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