"Some students do homework three or four times a week"中为什么要有"or"而不是"and"

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• "Some students do homework three or four times a week"中为什么要有"or"而不是"and"
• 英语翻译Here are the results of the student activity at green high school.Most students exercise three or four times a week.Some students exerciseonce or twice a week .Some students are very active,and exercise every day.As for homework ,Most students do homework every day .some stdents do homework three or four times a week .No students do homework once or twice a week .The results for "watch Tv"are interesting .Some students watch Tv once or twice week,
• what do student do at green high school这篇文章的知识点 Here are the results of the student activity survey at Green High School.Most students exercise three or four times a week.Some student exeercise are very active and exercise every day.As for homework,most students do homework every day.Some students do homework threeor four times a week.No students do homework once or twice a week.The results for"watch TV"are interesting.Some student watch TV once or tw
• "Some students do homework three or four times a week"中为什么要有"or"而不是"and"
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