题目内容
(请给出正确答案)
[单选题]
与a>b and b>c 等价的是()
A.>b or b>c
B.a>b>c
C.a>b or not b
D.not a
答案
B、a>b>c
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A.>b or b>c
B.a>b>c
C.a>b or not b
D.not a
B、a>b>c
A.WHEREGrade>60ANDGrade<100
B.WHEREGrade>=60ANDGrade<=100
C.WHEREGrade>60ORGrade<100
D.WHEREGrade>=60ORGrade<=100
A.SELECT*FORMSTUDWHEREAGE>12.AND.AGE>15
B.SELECT*FORMSTUDWHEREAGEL>=12.AND.AGE<=15
C.SELECT*FORMSTUDWHEREAGE>=12.OR.AGE<=15
D.SELECT*FORMSTUDWHEREAGE<=12.AND.AGE>=15
A.X>10 AND X<20
B.X>=10AND X<=20
C.X>10 OR X<20
D.x>=10 OR X<=20