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选择题 本大题共 12小题 ,每小题 5分 ,共 6 0分 ,在每小题给出的四个选项中 ,只有一项是符合题目要求的 .1 命题“2 0 0 1≤ 2 0 0 8” ( )(Ａ)使用了逻辑联结词“或” .(Ｂ)使用了逻辑联结词“且” .(Ｃ)使用了逻辑联结词“非” .(Ｄ)是假命题 .2 若集合Ｓ ={ｘ∈Ｚ|
There are a total of 12 items in the multiple-choice questions, each with 5 points and a total of 60 points. Among the four options given in each question, only one item meets the requirements of the topic. 1 Proposition “2 0 0 1 ≤ 2 0 0 8” () (A) uses the logical conjunction “or”. (B) uses the logical conjunction “and”. (C) uses the logical conjunction “non”. (D) is a false proposition. 2 If the set S = {x∈Z|