“”西沙群島風(fēng)景優(yōu)美、物產(chǎn)豐富”中的“西沙群島”是（）
下列（）選項(xiàng)是推理有效的？
“唐朝總統(tǒng)是一個(gè)偉大的政治家”中的“唐朝總統(tǒng) ”是（）
模態(tài)判斷“□﹁p”與“?p”（）
一個(gè)聯(lián)言判斷“﹁p∧q”為真，那么一定是（）
反證法先論證與原論題相矛盾的論斷為假，然后得到原論題真，其所依據(jù)的是（）
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集合概念與非集合概念
所反映的對象是一個(gè)集合體的概念稱為集合概念。西沙群島包括很多島嶼，是一個(gè)組合體，所以是集合概念。
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該科目易錯(cuò)題
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