提高聽力同時，你還可以了解到美國歷史上的一些重要事件。請感興趣的你一聽為快吧！
<注意>地區(qū)、海洋、國家大寫
hints：
Henry Clay
Missouri
In 1850, the United States was a large country, full of contrasts. New England and the Middle Atlantic states were the centers of finance, trade, shipping and manufacturing. Their products included lumber, machinery and textiles. Southern states had many farms that used slave labor to grow tobacco, sugar and cotton. The Middle Western states also had farms, but they were worked by free men. In 1819, Missouri asked to become a state. Northerners were against this because 10,000 slaves lived there. Because the constitution allowed each new state to elect two senators, new states could change the political balance between "free" and "slave" states. Congressman Henry Clay suggested a way to make the North and South happy. Missouri would become a state with slaves. Maine would become a state without slaves. The Missouri compromise was accepted.
在1850年，美國是一個充滿對比的大國。新英格蘭和大西洋中部各州的金融，貿(mào)易，航運(yùn)，和制造業(yè)中心。他們的產(chǎn)品包括木材，機(jī)械，紡織品。南部的州有許多農(nóng)場使用奴隸勞動的種植煙草，糖，棉花。中西部的州也有農(nóng)場，但他們是自由人的工作。在1819年，密蘇里州要求成為一個州。北方人都反對這一點(diǎn)，因為一萬名奴隸奴隸生活在那里。因為憲法允許每一個新的州選出兩名參議員的，新的州可以改變的“自由”和“奴隸”狀態(tài)之間的政治平衡。國會議員亨利克萊建議一種方法，使北方和南方的快樂。密蘇里州將成為一個奴隸的州。緬因州將成為一個沒有奴隸的州。密蘇里妥協(xié)被接受。