某养殖场2018年2月养牛存栏量为100头,污染当量值为0.1头,假设当地水污染物适用税额为每污染当量2.8元,则当月应纳环保税税额为( )。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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