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哪项不是GRADE方法具有的优势
A．由一个具有广泛代表性的国际指南制订小组制订
B．能够对所有类型文献形成的证据体进行评价
C．承认患者价值观和偏好
D．从证据分级到推荐意见强度全过程透明
参考答案和解析
D电子商务与传统商务活动方式相比，具有高效率、低成本、便捷、集成度高的优势。
更多 “哪项不是GRADE方法具有的优势A．由一个具有广泛代表性的国际指南制订小组制订B．能够对所有类型文献形成的证据体进行评价C．承认患者价值观和偏好D．从证据分级到推荐意见强度全过程透明” 相关考题
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关系SC(Sno，Cno，Grade)表示学号，课程号，成绩。现要查询平均分在90分以上的学生的学号和平均成绩，正确的语句是______。A．SELECT Sno，AVG(Grade) FROM SC WHERE AVG(Grade)＞=90 GROUP BY SnoB．SELECT Sno，AVG(Grade) FROM SC GROUP BY Sno HAVING AVG(Grade)＞=90C．SELECT Sno，AVG(Grade) FROM SC WHERE AVG(Grade)＞=90 ORDER BY SnoD．SELECT Sno，AVG(Grade) FROM SC GROUP BY Cno HAVING AVG(Grade)＞=90
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已知关系模式：sc(sno, sname, grade)，各属性含义依次为学号、课程名、分数。要查找“数据库”课分数最高的学生的学号，正确的SQL语句是A．SELECT sno FROM sc WHERE sname="数据库" AND grade=MAX(grade)B．SELECT sno FROM sc FOR sname="数据库" OR grade＞=MAX(grade)C．SELECT sno FROM sc WHERE sname="数据库" AND grade=(SELECT MAX(grade) FROM scD．SELECT sno FROM sc FOR sname="数据库" OR grade=(SELECT MAX (grade) FROM sc
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有如下程序： infocase$=InputBox("Inputoneletter:") Select Case infocase$ case"a" grade$="Verygood" case"b" grade$="Good" case"C" grade$="OK" case"d" grade$="Qualified" case Else grade$="Bab" End SelectA．Very goodB．GoodC．BadD．Qualified
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可以利用Connection对象的Execute方法实现对数据库的更改操作。下列将SC表中学号为S105的学生的成绩减少10分的语句,正确的是()。
A、ADOcn.Execute “ALTER SC SET Grade = Grade - 10 WHERE 学号 = 'S105' ”B、ADOcn.Execute “ALTER FROM SC SET Grade = Grade - 10 WHERE 学号 = 'S105' ”C、ADOcn.Execute “UPDATE SC SET Grade = Grade - 10 WHERE 学号 ='S105' ”D、ADOcn.Execute “UPDATE FROM SC SET Grade = Grade - 10 WHERE 学号 = 'S105' ”
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若要使所有学科80分以上的成绩都增加5%, 80至60分的成绩都增加10%，应如何更新数据库（ ）。 A．UPDATE SC SET GRADE=GRADE*1．05 WHERE SC．GRADE=80 UPDATE SC SET GRADE=GRADE* 1．10 WHERE SC．GRADE=60 AND SC．GRADE =80 B．UPDATE SC SET GRADE=GRADE* 1．10 WHERE SC．GRADE=60 AND SC．GRADE=80 UPDATE SC SET GRADE=GRADE* 1．05 WHERE SC．GRADE=80 C．UPDATE SC SET GRADE=GRADE* 1．05 WIRE SC．GRADE=80 AND SET GRADE =GRADE* 1．10 WHARE SC．GRADE=60 D．UPDATE SC SET GRADE=GRADE* 1．10 WHERE SC．GRADE=60 AND SC．GRADE =80 AND SET GRADE=GRADE* 1．05 WHERE SC．GRADE=80
考题
设在SQL Server 2008某数据库中有表SC（Sn0，Cn0，Grade），其中Grade列的类型为int。若在查询成绩时，希望将成绩按“优”、“良”、“中”、“及格”和“不及格”形式显示，则下列Case函数中正确的是（ ）。A.Case GradeWhen Grade between 90 and 100 THEN Grade=ˊ优ˊWhen Grade between 80 and 89 THEN Grade=ˊ良ˊWhen Grade between 70 and 79 THEN Grade=ˊ由ˊWhen Grade between 60 and 69 THEN Grade=ˊ及格ˊElse Grade=ˊ不及格ˊEndB.Case GradeWhen Grade between 90 and 100 THEN ˊ优ˊWhen Grade between 80 and 89 THEN ˊ良ˊWhen Grade between 70 and 79 THENˊ中ˊWhen Grade between 60 and 69 THENˊ及格ˊElseˊ不及格ˊEndC.CaseWhen Grade between 90 and 100 THEN Grade=ˊ优ˊWhen Grade between 80 and 89 THEN Grade=ˊ良ˊWhen Grade between 70 and 79 THEN Grade=ˊ由ˊWhen Grade between 60 and 69 THEN Grade=ˊ及格ˊElse Grade=ˊ不及格ˊEndD.CaseWhen Grade between 90 and 100 THENˊ优ˊWhen Grade between 80 and 89 THEN ˊ良ˊWhen Grade between 70 and 79 THEN ˊ由ˊWhen Grade between 60 and 69 THEN ˊ及格ˊElseˊ不及格ˊEnd
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设有如下关系 SC(sno，cname，grade)(各属性含义分别为学生的学号、课程名称、成绩)现要将所有学 生的课程成绩增加10分，以下能正确地完成此操作的SQL命令是A． MODIFYScSET grade+10B．UPDATEScSET grade+10C．MODIFYScSET grade=grade+10D．UPDATEScSET grade=grade+10
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Camphor oil is classified as a ______．A.Grade A flammable liquidB.Grade C flammable liquidC.Grade D combustible liquidD.Grade E combustible liquid
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设SC表中记录成绩的列为：Grade，类型为int。若在查询成绩时，希望将成绩按‘优’、‘良’、‘中’、‘及格’和‘不及格’形式显示，正确的Case函数是（）。A Case Grade When 90~100 THEN ’优’ When 80~89 THEN ’良’ When 70~79 THEN ’中’ When 60~69 THEN ’及格’ Else ’不及格’ EndB Case When Grade between 90 and 100 THEN Grade = ’优’ When Grade between 80 and 89 THEN Grade = ’良’ When Grade between 70 and 79 THEN Grade = ’中’ When Grade between 60 and 69 THEN Grade = ’及格’ Else Grade = ’不及格’ EndC Case When Grade between 90 and 100 THEN ’优’ When Grade between 80 and 89 THEN ’良’ When Grade between 70 and 79 THEN ’中’ When Grade between 60 and 69 THEN ’及格’ Else ’不及格’ EndDCase Grade When 90~100 THEN Grade = ’优’ When 80~89 THEN Grade = ’良’ When 70~79 THEN Grade = ’中’ When 60~69 THEN Grade = ’及格’ Else Grade = ’不及格’ End
考题
在linux系统中，更改组class的组名为grade，应执行（）命令。A、groupmod -l grade classB、groupmod -n grade classC、chgroup -l grade classD、chgroup -n grade class
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设在某SELECT语句的WHERE子句中，需要对Grade列的空值进行处理。下列关于空值的操作，错误的是（）。A、Grade IS NOT NULLB、Grade IS NULLC、Grade = NULLD、NOT （Grade IS NULL）
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单选题CGN（运营商NAT）是以下哪个英语的缩写A
Carrier-Grade NETB
Carrier-Grade NetworkC
Carrier-Grade NetworkingD
Carrier-Grade NAT
考题
单选题设SC表中记录成绩的列为：Grade，类型为int。若在查询成绩时，希望将成绩按‘优’、‘良’、‘中’、‘及格’和‘不及格’形式显示，正确的Case函数是（）。A
Case Grade When 90~100 THEN ’优’ When 80~89 THEN ’良’ When 70~79 THEN ’中’ When 60~69 THEN ’及格’ Else ’不及格’ EndB
Case When Grade between 90 and 100 THEN Grade = ’优’ When Grade between 80 and 89 THEN Grade = ’良’ When Grade between 70 and 79 THEN Grade = ’中’ When Grade between 60 and 69 THEN Grade = ’及格’ Else Grade = ’不及格’ EndC
Case When Grade between 90 and 100 THEN ’优’ When Grade between 80 and 89 THEN ’良’ When Grade between 70 and 79 THEN ’中’ When Grade between 60 and 69 THEN ’及格’ Else ’不及格’ EndD
Case Grade When 90~100 THEN Grade = ’优’ When 80~89 THEN Grade = ’良’ When 70~79 THEN Grade = ’中’ When 60~69 THEN Grade = ’及格’ Else Grade = ’不及格’ End
考题
多选题在线零售相对邮购具有的优势包括（）。A库存方面B多种结算方式C成本低D具交互性E省时方便
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