Armp公理系统的三条推理规则是【 】、增广律和传递律。
参考答案：自反律
解析：Armstrong公理系统的三条推理规则是自反律、传递律和增广律。
用所给词的适用形式填空。
1. We want two good ______ (music) for our club.
2. Oh, dear! Can all the ______ (child) swim?
3. He can help kids with ______ (swim).
4. He ______ (want) to join the chess club.
5. Mary sings very well. I hope she will be a good ______ (sing).
在括号里填入适当的数。
72.8+（ ） =100.53 75.8 -（ ）=37.6
7.25+（ ） = 10 8.725 -（ ）=1
（ ）- 14.6=6.48 （ ）+8.07=13
