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关于多表联接查询,以下( )描述是错误的 ( 选择一项 ) A. 外联接查询返回的结果集行数可能大于所有符合联接条件的结果集行数 B. 多表联接查询必须使用到 JOIN 关键字 C. 内联接查询返回的结果是：所有符合联接条件的数据 D. 在 where 子句中指定联接条件可以实现内联接查询
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【多选题】党的十八届五中全会报告提出,实现我国对外开放是以“引进来”为主,“走出去”为辅。“十三五”时期发展目标,破解发展难题,厚植发展优势,必须牢固树立并切实贯彻创新、协调、绿色、开放、共享的发展理念。要优化劳动力、资本、土地、技术、管理等要素配置,激发创新创业活力。要坚持节约资源和保护环境的基本国策,加快建设资源节约型、环境友好型社会。 1 材料中提到,要“优化劳动力、资本、土地、技术、管理等要素配置”...
A.
要求坚持按劳分配为主体，多种分配方式并存的分配制度
B.
要求让所有居民的收入都一样
C.
有利于调动劳动者的积极性和创造性
D.
有利于调动各种要素所有者的创造性和积极性
【单选题】听力原文： For good or bad, computers are now part of our daily lives. With the price of a small home computer now being lower, experts predict that before long all schools and businesses and most families...
A.
Computers have become part of our daily lives.
B.
Computers have advantages as well as disadvantages.
C.
People have different attitudes to computers.
D.
More and more families will own computers.
【单选题】听力原文： For good or bad, computers are now part of our daily lives. With the price of a small home computer now being lower, experts predict that before long all schools and businesses and most families...
A.
Computers have become part of our daily lives.
B.
Computers have advantages as well as disadvantages.
C.
People have different attitudes to computers.
D.
More and more families will own computers.
【单选题】听力原文： For good or bad, computers are now part of our daily lives. With the price of a small home computer now being lower, experts predict that before long all schools and businesses and most families...
A.
Computers have become part of our daily lives.
B.
Computers have disadvantages as well as advantages.
C.
People have different attitudes to computers.
D.
More and more families will own computers.
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