《排污费征收使用管理条例》规定，排污费的缓缴期限最长不超过( )。
A．2个月
B．3个月
C．4个月
D．6个月
参考答案：B
根据实际情况回答下列问题。
1. When is New Year's Day?
_____________________.
2. When is Spring Festival?
3. When is International Workers' Day?
________________________________.
4. When is Children's Day?
5. When is Teachers' Day?
6. When is National Day?
我国钢轨的标准长度有（）。
A.12.5m和25m
B.50m和100m
C.1000m
D.250m
