设a,b是任意实数，下列哪些运算在实数集合上满足交换律和结合律（ ）。
A:
B:
C:
D:
A:
B:
C:
D:
举一反三
- <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/c3b75de7a0ff4216a7c936dfa863e921.PNG" /> A: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/9bc090082ac447aab731646e7ce4a372.PNG" /> B: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/5666843a7db64c75a2ec586b2db2f35f.PNG" /> C: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/fd98481c51284a9db6d3c21bd7fa60ca.PNG" /> D: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/6f7725736cf84d439343d0c213a650e7.PNG" />
- <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/9b4d8d9a44a447c2af0bf584f998415d.PNG" /> A: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/189e9a57dc014ea8900a1c5f439cd232.PNG" /> B: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/674e45e808174455ad0e186c323d1505.PNG" /> C: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/d383f19ca7094dfdaaa9c71c2b63d924.PNG" /> D: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/995fe28645a0486cbcd43885cdc51a76.PNG" />
- 设a,b是任意实数，在实数集R上定义的下列运算，哪个满足消去律 A: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/308d9ac28dda4f4492155a69b7bd37c7.PNG" /> B: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202103/95fb0ef6f80a47cfb2f5a17c71a95da1.png" /> C: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/632abcab80f54f019178a6cae5372ed4.PNG" /> D: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/76c99637eff445f39bdabb17b9af8b77.PNG" />
- 以下说法错误的是（）。 A: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/19d925ad13764c298684def78fbdc3ea.png" /> B: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/43f3e8b36fab4d1baf26ae9614035af9.png" /> C: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/eed86e09829a4f09b7802aca8c5efa57.png" /> D: <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/3584ca66a59a438ea2e7f92979a19b72.png" />
- <img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/20b0dadfeb44401fa4f539c095a4fad1.PNG" /><img src="https://image.zhihuishu.com/zhs/teacherExam_h5/COMMONUEDITOR/202104/0dfbbf709759439caf9009f3de19cc8e.PNG" /> A: 幂等律 B: 结合律 C: 消去律 D: 交换律