题目内容

表达式{1,2,3,4}-{3,4,5,6}的值是()

A. {1,2}
B. {1,2,3,4}
C. {3,4}
D. {1,2,3,4,5,6}

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下列表达式T-S的值是()S={1010,"1010",78.9}T={1010,"1010",12.3,1010,1010}

A. {1010,"1010"}
B. {78.9}
C. {12.3}
D. {1010,"1010",12.3}

下列表达式S-T的值是()S={1010,"1010",78.9}T={1010,"1010",12.3,1010,1010}

A. {1010,‘1010’}
B. {78.9}
C. {12.3}
D. {1010,"1010",12.3}

下列表达式S&T的值是()S={1010,"1010",78.9}T={1010,"1010",12.3,1010,1010}

A. {1010,‘1010’}
B. {1010,‘1010’,12.3,78.9}
C. {1010,‘1010’,12.3,78.9,1010,1010}
D. {1010,"1010",12.3}

下列表达式S^T的值是()S={1010,"1010",78.9}T={1010,"1010",12.3,1010,1010}

A. {78.9,12.3}
B. {1010,78.9,'1010'}
C. {1010,"1010",12.3}
D. {1010,‘1010’,12.3,78.9,1010,1010}

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