根据“44号文”的规定，因施工场地条件限制而发生的材料、构配件、半成品等一次运输不能到达堆放地点，必须进行二次或多次搬运所发生的费用属于（）。 ["A.材料费 ","B.大型机械设备进出场及按拆费 ","C.二次搬运费 ","D.运杂费"]
In which two ways does an integrated security solution reduce TCO？ （） [" by enabling businesses to leverage investments in the network"," by spending less time addressing attacks"," by enforcing policy compliance"," through admission control"]
计算报社销售总收入的三个公式中都含有一个指标，这个指标是（） ["报社办报收入","报社发行收入","报社印刷厂收入","报社多种经营收入"]
区分不同分税制模式的关键在于看税收（）是否集中于中央。 ["管理权","立法权","执法权","减免权"]
货币市场共同基金一般属封闭型基金，即其基金份额不可以随时购买和赎回。
简述网上银行产生的原因。
