问题 单项选择题

()发现光速不变原理两个坐标系的变换关系。

A、爱因斯坦

B、牛顿

C、洛伦兹

D、海森堡

答案

参考答案:C

写作题
假设你班将举行一次英语班会,主题是“中学生应该如何使用家长给的零花钱”。请你根据提示写一篇发言稿。   
使用方式
好处
存入银行
养成节约的习惯
购买书籍
获取知识
其他
培养兴趣(音乐、体育、集邮等)
注意:
1.词数:120左右。
2.参考词汇:零花钱pocket money
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单项选择题