【单选题】用来维护两个表之间的一致性关系的约束是( )。
【单选题】人类经历过5次信息技术革命,其中第一次是( )。
【单选题】在网站中,写入时,需加锁、解锁的状态管理方式是()。
【简答题】【T7】 A.WITH B.BUT C.PROTECTION A.IT USUALLY GIVES INADEQUATE【T7】_______FROM THE WEATHER B.NOT ONLY IN SOME DEVELOPING COUNTRIES WHERE BICYCLES ARE MAJOR MEANS OF PEOPLE AND GOODS,【T8】______IN A FEW RI...
【简答题】【T7】 A.CONCERNED B.IN C.CONTRIBUTES A.DO THEIR JOBS【T7】______THEIR OWN WAY B.AS FAR AS INCREASING PRODUCTIVITY IS【T8】______ C.HOW MUCH EACH WORKER【T9】______TO THE PRODUCT IN RECENT YEARS MANY COUNTRIE...
【单选题】人类经历过5次信息技术革命,其中第一次是
【简答题】根据所给的首字母填空(Unit4 Body Language 单元词汇) 1. As winter is a____ the weather is getting colder. 2. In some Asian countries s____ the head means “agreement”. 3. People now c___ over long distances by means o...
【单选题】SQLServer的6种约束中,用来维护两个表之间的一致性关系的约束是()。
【单选题】In some East Asian countries, average income, as measured by real GDP per person, has recently grown at an average annual rate that implies output will double about every
【简答题】【T10】 A.CONCERNED B.IN C.CONTRIBUTES A.DO THEIR JOBS【T7】______THEIR OWN WAY B.AS FAR AS INCREASING PRODUCTIVITY IS【T8】______ C.HOW MUCH EACH WORKER【T9】______TO THE PRODUCT IN RECENT YEARS MANY COUNTRI...