CET4 阅读分析
2005-CET4-01-03
2005
年
1
月
Environment
难度画像
阅读训练指标
词数
317
句数
12
平均句长
26.42
词汇难度
2.07
CET4 覆盖
86.8%
CET6 覆盖
0.9%
超纲词
12.3%
复杂句
75.0%
文章摘要
适合搜索和复盘的公开信息
2005-CET4-01-03 的 CET4 阅读分析摘要，主题为 Environment，约 317 词，包含词汇覆盖率、复杂句比例、平均句长和备考精读信号。
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原文短预览
Lead deposits, which accumulated in soil and snow during the 1960 s and 70 s, were primarily the result of leaded gasoline emissions originating in the United States. In the twenty years that the Clean Air Act has mandated unleaded gas use in the United States, the lead accumulation worldwide has decreased significantly. A study published recently in the journal Nature shows that air-borne leaded gas emissions from t...
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