碳-12原子的实际质量为m千克,则实际质量为2m千克的另一种元素的原子的相对原子 发布时间:2017-04-25 00:28 │ 来源:www.tikuol.com 题型:填空题 问题: 碳-12原子的实际质量为m千克,则实际质量为2m千克的另一种元素的原子的相对原子质量为___________。
题型:填空题 根据句意填写单词使句子完整。1. In Canada you should _____ hands when you meet someone for the first time. 2. He wanted to the girl on the check, but she refused him. 3. Switzerland is the ________of watches. 4. The teacher has a strict attitude her work.5. Western people cat food with a and . 查看答案
题型:填空题 __________ did your family live in New York before you were born? [ ]A. How soon B. How long C. When D. How far 查看答案