- 任务完成
- 7.0分
- 连贯与衔接
- 7.0分
- 词汇资源
- 7.0分
- 语法范围与准确性
- 6.5分
The given pie charts show data on the main energy sources in the United States of America in two decades. As is presented in the pie charts, oil was the main energy source for the USA both in the 80s and 90s but the use of oil and coal had reduced and their places as energy sources were somewhat replaced by the use of nuclear power in the USA.