名词解释题加速坡 accelerating grade
名词解释题
加速坡 accelerating grade
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相关考题：
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
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
单选题驼峰溜放部分又由（）坡段组成。通过溜放坡给溜放车组以必要的加速度。A加速坡、中间坡、缓冲坡B峰顶坡、加速坡、道岔区段坡、编组线坡C加速坡、中间坡和道岔区坡、编组线坡D峰顶坡、中间坡、道岔坡、编组线坡
名词解释题压钩坡 coupler compression grade