哪一项不是针对出现丝状菌膨胀而采取的措施()
A.减少进水量或暂停进水
B.加氯杀灭丝状菌
C.加大污泥回流量
D.投加混凝剂或惰性物质,改善污泥的沉降性能
参考答案:C
从事生产、经营的纳税人外出经营,在同一地累计超过()的,应当在营业地办理税务登记手续。
A.60日
B.80日
C.150日
D.180日
Sam is training for the marathon. He drove 12 miles from his home to the Grey Hills Park and then ran 6 miles to Red Rock, retraced his path back for 2 miles, and then ran 3 miles to Rock Creek. If he is then n miles from home, what is the range of possible values for n ?()
A. 1≤n≤23
B. 3≤n≤21
C. 5≤n≤9
D. 6≤n≤18
E. 9≤n≤15