瓦斯是在煤炭形成以后才产生的。
参考答案:错
翻译画线部分。
1. Li Ming arrives in Beijing at 2: 00 in the afternoon. ______________
2. Children's Day is June first. ______________
3. Women's Day is March eighth. ______________
4. 这些孩子are crying. ______________
5. These men are 玩扑克. ______________
严重创伤时,血钾()
A.无改变
B.明显降低
C.明显升高
D.变化随血钠而定
E.变化随尿量而定