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【单选题】
以下哪个布尔逻辑检索式查准率最高A.
a or b or c
B.
a and c
C.
(a or c)and b
D.
a or b and c
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A.
appeared
B.
come
C.
emerged
D.
discovered
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A.
bring up
B.
bring down
C.
bring forward
D.
bring out
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