​谁能帮忙解释一下。

Question

Answer 1

p为s与m的差集，因为s集合元素数量小于m,所以结果为空集合。同理q为只有一个'Bart'元素的集合。而p|q就是求这两个集合的并集，所以结果为只有一个Bart元素的set集合。

Answer 2

https://www.oschina.net/search?identification=1628426453236&scope=project&q=%E5%90%88%E8%82%A5%E5%8D%87%E9%99%8D%E8%BD%A6%E7%A7%9F%E8%B5%8115955105106

https://www.oschina.net/search?identification=1628426608238&scope=project&q=%E5%90%88%E8%82%A5%E5%8D%87%E9%99%8D%E6%9C%BA%E7%A7%9F%E8%B5%8115955105106

https://www.oschina.net/search?identification=1628426617379&scope=project&q=%E5%90%88%E8%82%A5%E5%8D%87%E9%99%8D%E5%B9%B3%E5%8F%B0%E7%A7%9F%E8%B5%8115955105106

https://www.oschina.net/search?identification=1628426628714&scope=project&q=%E5%90%88%E8%82%A5%E9%AB%98%E7%A9%BA%E8%BD%A6%E7%A7%9F%E8%B5%8115955105106 

https://so.pansoso.com/zh/%E5%90%88%E8%82%A5%E5%8D%87%E9%99%8D%E8%BD%A6%E7%A7%9F%E8%B5%8115955105106

https://so.pansoso.com/zh/%E5%90%88%E8%82%A5%E5%8D%87%E9%99%8D%E6%9C%BA%E7%A7%9F%E8%B5%8115955105106

https://so.pansoso.com/zh/%E5%90%88%E8%82%A5%E5%8D%87%E9%99%8D%E5%B9%B3%E5%8F%B0%E7%A7%9F%E8%B5%8115955105106

https://so.pansoso.com/zh/%E5%90%88%E8%82%A5%E9%AB%98%E7%A9%BA%E8%BD%A6%E7%A7%9F%E8%B5%8115955105106

Answer 3

https://www.haote.com/search?keyword=%BA%CF%B7%CA%C9%FD%BD%B5%B3%B5%D7%E2%C1%DE15955105106

https://www.haote.com/search?keyword=%BA%CF%B7%CA%C9%FD%BD%B5%BB%FA%D7%E2%C1%DE15955105106

https://www.haote.com/search?keyword=%BA%CF%B7%CA%C9%FD%BD%B5%C6%BD%CC%A8%D7%E2%C1%DE15955105106

https://www.haote.com/search?keyword=%BA%CF%B7%CA%B8%DF%BF%D5%B3%B5%D7%E2%C1%DE15955105106

Answer 4

https://www.bilibili.com/video/BV1AL411p77e/

https://www.bilibili.com/video/BV1bU4y1H7Xi/

https://www.bilibili.com/video/BV1Bh411q7G1/

https://www.bilibili.com/video/BV1u3411r7hu/

https://www.bilibili.com/video/BV1GP4y1x7aE/

https://www.bilibili.com/video/BV17f4y1L7LX/

https://www.bilibili.com/video/BV1xv411J7Ws/

https://www.bilibili.com/video/BV1dU4y1E7RH/

https://www.bilibili.com/video/BV1Cy4y157Us/

https://www.bilibili.com/video/BV1Uy4y157dg/

https://www.bilibili.com/video/BV1UM4y1N79Q/

Answer 5

https://b2b.baidu.com/s?fr=wwwt&q=%E5%9B%9B%E5%B7%9D%E9%B8%9F%E6%9E%AAzd%2F%E6%88%90%E9%83%BD%E7%A7%83%E5%AD%90%E3%80%9094O03O11q%E3%80%91MRY
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https://b2b.baidu.com/s?fr=wwwt&q=mp654k%E4%BB%BF64%E3%80%9094O03O11q%E3%80%91T5S
https://b2b.baidu.com/s?fr=wwwt&q=%E7%A7%83%E9%B9%B0%E9%95%BF%E5%BE%97%E5%A5%BD%E8%BF%98%E6%98%AF%E7%9F%AD%E7%9A%84%E5%A5%BD%E3%80%9094O03O11q%E3%80%91W7A
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