今日目标：掌握分数词的2个知识点。
1.分数词：由基数词和序数词构成，基数词代表分子，序数词代表分母。除了分子为1的情况外，序数词都要用复数形式。1/4 one-forth; 2/3 two thrids
分数词在句子中的作用：主语、宾语或介词宾语，表语或同位语、定语、状语
The bottle has been about three-quarters full then.
2.小数的读法和用法
0.45 zero poubt four five/ 1.02 one point oh two
小数做法定与比较多： its total output value wasup to 3.6 times in three years.
它的总产值三年增长了3.6倍。
3.百分数的用法
常和percent 和by 连用, 做状语: The price was reduced by 20 percent.
It's total output value increased by 11.5 precent over the previous year.
还可以用作主语、宾语或定语。
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