系统性能调整的手段包括______。 ①数据查询调整与优化 ②索引调整 ③数据库模式调整 ④DBMS和操作系统参数调整 ⑤数据库应用程序优化 ⑥硬件配置调整和升级 A) ①②④⑤⑥ B) ①②③⑤⑥ C) ②③④⑤⑥ D) ①②③④⑤⑥
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【简答题】In America, just as in Europe, men usually open doors for women, and women always walk ahead of men into a room or a restaurant, unless(除非) the men have to be ahead of the ladies to choose the table, ...
【简答题】In America, just as in Europe, men usually open doors for women, and women always walk ahead of men into a room or a restaurant, unless the men have to be ahead of the ladies to choose the table, to o...