A total of 40 tourists went on a trip．If 18of the tourists visited site X，18 visited site Y．and 8 visited both site X and site Y，how many visited neither site X nor site Y（）
A: 4
B: 10
C: 12
D: 22
E: 28
A: 4
B: 10
C: 12
D: 22
E: 28
举一反三
- "now a historic site that Carter formerly directed" directed here means? A: managed B: visited
- 使用site命令语法有两种格式，分别是（ ） A: site:网址 关键词 B: 关键词 site:网址 C: 网址 site:关键词 D: site：关键词 网址
- In which revolutionary site was the Seventh National Congress of the Communist Party of China held? A: Fenghuangshan Revolutionary Site B: Yangjialing Revolutionary Site C: Zaoyuan Revolutionary Site D: Wangjiaping Revolutionary Site
- 下面用site构建的检索式正确的是？（ ） A: 关键词 site:sina.com B: site: 关键词 sohu.com C: site:people.com.cn 关键词 D: 关键词 site:https://www.gmw.cn
- Site 语法的格式有3种，分别是：site:网址 关键词、关键词 site:网址和网址 site:关键词。（）