专题02充分条件与必要条件、全称量词与存在量词
A组基础巩固
1．<Object: word/embeddings/oleObject1.bin>
的一个充分不必要条件是（
）A．<Object: word/embeddings/oleObject2.bin>
B．<Object: word/embeddings/oleObject3.bin>
C．<Object: word/embeddings/oleObject4.bin>
D．<Object: word/embeddings/oleObject5.bin>
【答案】
A【分析】
解不等式求出解集，再由充分不必要条件转化为集合的包含关系即可求解
.【详解】
<Object: word/embeddings/oleObject6.bin>
，<Object: word/embeddings/oleObject7.bin>
或<Object: word/embeddings/oleObject8.bin>
<Object: word/embeddings/oleObject9.bin>
的一个充分不必要条件为集合
<Object: w ...