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【单选题】
现金比率的公式是A.
货币资金／流动负债×100%
B.
（货币资金＋有价证券）／流动负债×100%
C.
现金／流动负债×100%
D.
现金及现金等价物／流动资产×100%
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【单选题】Suppose relation R(A,C) has the following tuples: A C 3 4 6 4 2 3 3 5 7 1 and relation S(B,C,D) has the following tuples: B C D 5 1 6 1 5 8 4 4 9 Compute the natural join of R and S. Which of the foll...
A.
(6, 4, 3, 9)
B.
(3, 4, 3, 9)
C.
(7, 5, 1, 6)
D.
(3, 4, 3, 9)
【单选题】Suppose relation R(A,B) has the following tuples: A B 1 2 1 5 5 6 and relation S(B,C,D) has the following tuples: B C D 2 4 6 6 6 8 5 7 9 Compute the natural join of R and S. Which of the following tu...
A.
(1,2,6,8)
B.
(3,4,7,8)
C.
(1,6,6,8)
D.
(1,5,7,9)
【简答题】By my third day in the hospital, I realized Tom didn’t visit. I couldn’t understand 36 my best friend wouldn’t come to see me. Struggling against the 37 , I phoned his __ 38 . His mother answered, and...
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A.
“零度风格”
B.
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C.
“非个人化”
D.
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【单选题】Tom didn’t go hiking with his classmates his illness.
A.
because
B.
because of
C.
since
【单选题】Tom didn’t go hiking with his classmates ____ his illness.
A.
because
B.
because of
C.
as
D.
since
【单选题】Tom didn’t go hiking with his classmates ____ his illness.
A.
because
B.
because of
C.
as
【单选题】Suppose relation R(A,C) has the following tuples: A C 3 4 6 4 2 3 3 5 7 1 and relation S(B,C,D) has the following tuples: B C D 5 1 6 1 5 8 4 4 9 Compute the natural join of R and S. Which of the foll...
A.
(6, 4, 4, 9)
B.
(3,4,4,9)
C.
(7,5,1,6)
D.
(3,4,3,9)
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