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【简答题】
十进制数-36的补码是二进制数11001011的十进制无符号数是 B 。
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举一反三
【多选题】社会营销观念要求市场营销者在制定市场营销政策时要统筹兼顾。
A.
企业利润
B.
消费者需要
C.
所有者利益
D.
社会利益
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【多选题】精油取样所用的工具包括搅拌器、抽油器 ( ) 、活栓、泵、虹吸管、玻璃取样管和容器。
A.
底部取样器
B.
表层取样器
C.
中心取样器
D.
区层取样器
查看完整题目与答案
【单选题】麻疹患儿具有传染性的时段是
A.
出疹前9天至出疹后5天
B.
出疹前5天至出疹后10天
C.
出疹前10天至出疹后5天
D.
出疹前10天至出疹后10天
E.
出疹前3天至出疹后10天
查看完整题目与答案
【单选题】Suppose relation R(A,B,C) has the following tuples: A B C 1 2 3 4 2 3 4 5 6 2 5 3 1 2 6 Select the tuples with the condition of either A>B or B>C. Which of the following tuples is in the result?
A.
(4,5,3)
B.
(2,5,3)
C.
(4,5,6)
D.
(1,2,3)
查看完整题目与答案
【单选题】Suppose relation R(A,B) has the following tuples: A B 1 2 3 4 5 6 and relation S(B,C,D) has the following tuples: B C D 2 4 6 4 6 8 4 7 9 Compute the theta-join of R and S with the condition R.A < S.D...
A.
(3,4,4,6,8)
B.
(1,2,2,6,8)
C.
(5,6,4,6,8)
D.
(1,2,4,6,8)
查看完整题目与答案
【单选题】麻疹患儿具有传染性的时段是
A.
出疹前5天至出疹后5天
B.
出疹前5天至出疹后10天
C.
出疹前10天至出疹后5天
D.
出疹前10天至出疹后10天
E.
出疹期
查看完整题目与答案
【单选题】Suppose relation R(A,B,C) has the following tuples: A B C 1 2 3 4 2 3 4 5 6 2 5 3 1 2 6 Compute the projection π C,B (R). Which of the following tuples is in the result?
A.
(2,3)
B.
(4,3)
C.
(3,2)
D.
(5,6)
查看完整题目与答案
【单选题】Suppose relation R(A,B,C) has the following tuples: A B C 1 2 3 4 2 3 4 5 6 2 5 3 2 1 6 Select the tuples with the condition of either A>B or B>C. Which of the following tuples is NOT in the result?
A.
(4,2,3)
B.
(2,5,3)
C.
(4,5,6)
D.
(2,1,6)
查看完整题目与答案
【单选题】Suppose relation R(A,B) has the following tuples: A B 1 a 7 t 2 g 4 c 9 t and relation S(B,C,D) has the following tuples: B C D c 5 6 a 7 8 t 8 9 Compute the theta-join of R and S with the condition R...
A.
(1, a, a, 7, 8)
B.
(2, g, c, 5, 6)
C.
(4, c, c, 7, 8)
D.
(4, c, c, 7, 8)
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【单选题】Suppose relation R(A,B,C) has the following tuples: A B C 1 2 3 4 2 3 4 5 6 2 5 3 1 2 6 Compute the projection π C,A (R). Which of the following tuples is in the result?
A.
(1,3)
B.
(4,3)
C.
(3,4)
D.
(5,3)
查看完整题目与答案
相关题目：
【多选题】社会营销观念要求市场营销者在制定市场营销政策时要统筹兼顾。
A.
企业利润
B.
消费者需要
C.
所有者利益
D.
社会利益
查看完整题目与答案
【多选题】精油取样所用的工具包括搅拌器、抽油器 ( ) 、活栓、泵、虹吸管、玻璃取样管和容器。
A.
底部取样器
B.
表层取样器
C.
中心取样器
D.
区层取样器
查看完整题目与答案
【单选题】麻疹患儿具有传染性的时段是
A.
出疹前9天至出疹后5天
B.
出疹前5天至出疹后10天
C.
出疹前10天至出疹后5天
D.
出疹前10天至出疹后10天
E.
出疹前3天至出疹后10天
查看完整题目与答案
【单选题】Suppose relation R(A,B,C) has the following tuples: A B C 1 2 3 4 2 3 4 5 6 2 5 3 1 2 6 Select the tuples with the condition of either A>B or B>C. Which of the following tuples is in the result?
A.
(4,5,3)
B.
(2,5,3)
C.
(4,5,6)
D.
(1,2,3)
查看完整题目与答案
【单选题】Suppose relation R(A,B) has the following tuples: A B 1 2 3 4 5 6 and relation S(B,C,D) has the following tuples: B C D 2 4 6 4 6 8 4 7 9 Compute the theta-join of R and S with the condition R.A < S.D...
A.
(3,4,4,6,8)
B.
(1,2,2,6,8)
C.
(5,6,4,6,8)
D.
(1,2,4,6,8)
查看完整题目与答案
【单选题】麻疹患儿具有传染性的时段是
A.
出疹前5天至出疹后5天
B.
出疹前5天至出疹后10天
C.
出疹前10天至出疹后5天
D.
出疹前10天至出疹后10天
E.
出疹期
查看完整题目与答案
【单选题】Suppose relation R(A,B,C) has the following tuples: A B C 1 2 3 4 2 3 4 5 6 2 5 3 1 2 6 Compute the projection π C,B (R). Which of the following tuples is in the result?
A.
(2,3)
B.
(4,3)
C.
(3,2)
D.
(5,6)
查看完整题目与答案
【单选题】Suppose relation R(A,B,C) has the following tuples: A B C 1 2 3 4 2 3 4 5 6 2 5 3 2 1 6 Select the tuples with the condition of either A>B or B>C. Which of the following tuples is NOT in the result?
A.
(4,2,3)
B.
(2,5,3)
C.
(4,5,6)
D.
(2,1,6)
查看完整题目与答案
【单选题】Suppose relation R(A,B) has the following tuples: A B 1 a 7 t 2 g 4 c 9 t and relation S(B,C,D) has the following tuples: B C D c 5 6 a 7 8 t 8 9 Compute the theta-join of R and S with the condition R...
A.
(1, a, a, 7, 8)
B.
(2, g, c, 5, 6)
C.
(4, c, c, 7, 8)
D.
(4, c, c, 7, 8)
查看完整题目与答案
【单选题】Suppose relation R(A,B,C) has the following tuples: A B C 1 2 3 4 2 3 4 5 6 2 5 3 1 2 6 Compute the projection π C,A (R). Which of the following tuples is in the result?
A.
(1,3)
B.
(4,3)
C.
(3,4)
D.
(5,3)
查看完整题目与答案
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