An earthquake comes like a theif in night, without warning. It was necessary,
therefore, to invent instruments that neither slumbered nor slept.
Some devices were quite simple. One, for instance,
c...
英文文章 | 文章字数 | 测试时长 | 准确率 | 速度 | 退格数 | 出错数 | 成绩 |
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《NCE4L42 Recording an earthquake新概念4-42记录地震》 | 3654字 | 2.0分钟 | 100% | 141 CPM | 16 次 | 0 | 及格,继续努力! |
励志名言: 朱门酒肉臭,路有冻死骨。 ——杜甫 | |||||||
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