诗歌听写:世界上最远的距离

化学的历史

化学的历史The History of Chemistry Chemistry did not emerge as a science until after the scientific revolution in the seventeenth century and then only rather slowly and laboriously. But c...

美文听写:学无止境(上)

1. engineering n.工程(学)，工程师行业 2. frightened adj. 受惊的, 受恐吓的7 so much to learn It was the last day of final examination in a large Eastern university. On the steps of one bui...

世界上普遍存在危险的含铅油漆（2）

Hints: Professor ClarkThe United States has restricted lead content in paint since 1978. Until this past month, the safety standard for consumer paints was 600 parts per million. But the Consumer...