再生注氯量低于()kg/h大于()秒,注氯系统停。
参考答案:0.84,30
In that school, English is compulsory for all students, but French and Russian are .
A.special
B.regional
C.optional
D.original[
我国远洋渔业企业在公海或按照有关协议规定,在国外海域捕获并运回国内销售的自捕水产品(及其加工制品),视同国内产品,不征收进口关税和进口环节增值税。