问题
问答题
以“雾霾天减少了或者是因为工业排污少了，或者是因为汽车排放尾气少了”为前提，
加上另一个前提：“雾霾天少了不是因为汽车排放尾气少了”，能否必然得出结论，为什么
答案
参考答案：能必然得出结论。因为相容选言推理否定部分选言支，可以肯定其他选言支。
搜题请搜索小程序“爱下问搜题”
以“雾霾天减少了或者是因为工业排污少了，或者是因为汽车排放尾气少了”为前提，
加上另一个前提：“雾霾天少了不是因为汽车排放尾气少了”，能否必然得出结论，为什么
参考答案：能必然得出结论。因为相容选言推理否定部分选言支，可以肯定其他选言支。
| 从方框中选择恰当的选项补全对话。其中有两项是多余的。 | |
B: Sure. What can I do for you, young man? A: 2 So our class want to go on a trip. I'd like to look for some sightseeing information. I want to know if you have a one-day tour. B: Of course we do. We have many such tours. 3 A: Well, we are going to visit Furong Cave (芙蓉洞), Three Natural Bridges (天生三桥), Fairy Mountain (仙女山) and so on. B: They are interesting places in Wulong. 4 A: Well, today is Jan 8th. And we still have another four days before the final exams. 5 B: Oh, I see. |