37-4 单位1的转化和统一

六年级-单位“1”的转化（一）

Unit Conversion the Easy Way (Dimensional Analysis)

Travel wasn’t always safe. During Jim Crow, Victor Hugo Green created the Negro Motorist Green Book to help Black travelers find places where they were welcomed. 📚 Source: https://americacomesalive.com/victor-hugo-green-1892-1960-creator-green-book-first-travel-guide-african-americans/ . . #BlackHistory #GreenBook #VictorHugoGreen #TravelingWhileBlack #HiddenHistory #JimCrow #HERandHIStoryinblack #HistoryMatters

As I was putting together my Jesse Jackson content last week, I came across a story I wanted to share — the Greenville Eight. Most people think of sit-ins at lunch counters — but one of the early sit-ins happened inside a library. On July 16, 1960, eight Black students walked into the whites-only Greenville County Public Library in South Carolina and quietly sat down to read. They were arrested for “disorderly conduct,” but their protest sparked public pressure and legal action. What many people