（）分菜服务侧重于分切技术，因此分菜服务所需要用具较多，有服务车，分割切板，刀，叉等

进行财务评价盈亏平衡分析时，需将总成本费用分解为( )。

A．单位产品成本和总成本费用

B．制造成本和销售成本

C．固定成本和可变成本

D．有形成本和无形成本

有一瓶因保存不当而部分变质的氢氧化钠固体（假设杂质只有碳酸钠），为测定其组成，称取一定质量固体样品，向其中滴加溶质质量分数为7.3％的稀盐酸，放出二氧化碳气体质量与加入稀盐酸的质量关系如下图所示。

试求：

（1）样品中碳酸钠的质量是多少克？它消耗的盐酸的质量是多少克?

（2）样品总质量是多少克？

（3）样品恰好完全反应时，所得溶液的溶质质量分数是多少？

The ARPANET (66) ( the rules of syntax that enable computers to communicate on a network) were originally designed for openness and flexibility, not for (67) The ARPA researchers needed to share information easily, so everyone needed to be an unrestricted "insider" on the network. Although the approach was appropriate at the time, it is not one that lends itself to today’s commercial and government use.
As more locations with computers (known as (68) in Internet parlance)joined the ARPANET, the usefulness of the network grew. The ARPANET consisted primarily of university and government computers, and the applications supported on this network were simple: electronic mail ( E - mail), electronic news groups, and (69) connection to other computers. By 1971, the Internet linked about two dozen research and government sites, and researchers had begun to use it to exchange (70) not directly related to the ARPANET itself. The network was becoming an important tool for collaborative research.

A．protocols

B．statute

C．law

D．enactment

提高蒸汽初参数、降低蒸汽终参数均可提高机组的热经济性，其受哪些主要条件限制？

中国橡胶进出口公司从斯里兰卡买进一批橡胶，价值50万英镑(CPR上海)，在中国人民保险公司投保平安保险，租用希腊籍船E轮装运。E轮在伦敦保险协会投保船壳综合险。E轮从科论坡启航半小时后即发现船舱漏水，后来又发现导航设备失灵。船长命令返航修理，修理期间船长辞职。船东临时将大副提升为船长，重新开航。船到我国广州海域时，偏航触礁后搁浅，由广州救捞公司拖至黄埔港修理。船东为此支付救助费7万英镑。船检发现，触礁造成损失 2万英镑，支付修理费6万英镑。船方宣布本航次共同海损金额为28万英镑，要求我橡胶公司参与分摊。本案属于______。

A．共同海损

B．单独海损

C．船舶不适航引起

D．不可抗力造成的