有四种物质的溶液：①NaOH、②Cu(NO3)2、③HCl、④MgSO4，不用其

甲公司在2012年度的会计利润为-300万元，按照税法规定允许用以后5年税前利润弥补亏损。甲公司预计2013年至2015年每年应税收益分别为100万元、150万元和80万元，假设适用的所得税税率始终为25%，假设无其他暂时性差异。则甲公司因该事项2014年递延所得税资产发生额为()万元。

A.37.5

B.0

C.-37.5

D.-12.5

设有图书管理数据库：
图书(总编号C(6)．分类号C(8)，书名C(16)，作者C(6)，出版单位C(20)，单价N(6，2))
读者(借书证号C(4)，单位C(8)，姓名C(6)，性别C(2)，职称C(6)，地址C(20))
借阅(借书证号C(4)，总编号C(6)，借书日期D(8))

对于图书管理数据库，检索电子工业出版社的所有图书的书名和单价，检索结果按单价降序排列，下面SQL语句正确的是______。
SELECT书名，单价FROM图书WHERE出版单位="电子
工业出版社"；
______

A．GROUP BY单价DESC

B．ORDER BY单价DESC

C．ORDER BY单价ASC

D．GROUP单价ASC

结合实例，说明几种主要的启发式问题解决策略。

"What does the middleman do but add to the price of goods in the shops " Such remarks are aimed at the intermediate operations between manufacturers and final customers. This practice usually attracts a lot of attention from the public and the press and the operation most talked about is what is often called wholesaling.
The wholesaler buys goods in large quantities from the manufacturers and sells them in smaller parcels to retailers, and for this service his selling price to the retailer is raised several percent higher. But his job is made more difficult by retail demand not necessarily running level with manufacturers’ production. Because he adjusts or regulates the flow of goods by holding stock Until required, he frees the manufacturer, to some extent, from the effect on production of changing demand and having to bear the whole risk.
The manufacturer can then keep up a steady production flow, and the retailer has no need to hold heavy stocks, who can call on the wholesaler for supplies any time. This wholesale function is like that of a valve in a water pipe. The middleman also bears part of the risk that would otherwise fall on the manufacturer and also the retailer.
The wholesaler provides a purely commercial service, for which he is too well rewarded. But the point that is missed by many people is that the wholesaler is not just someone adding to the cost of goods. It is true one could eliminate the wholesaler but one would still be left with his function: that of making sure that goods find their way to the people who want them.

The middleman relieves the producer of ______.

A．fluctuating market demand and staying at risk

B．the production of commodities for the retail market

C．some extent of production of changing demand

D．storing goods in a warehouse until they are needed

女性，25岁。四肢麻木、瘫痪一周。诊断为慢性炎症性脱髓鞘性多神经病（CI-DP）

下列关于CIDP的描述哪项不正确（）

A.发病后症状达到高峰的时间超过2个月

B.一般有前驱症状

C.感觉和运动功能同时受累

D.多有缓慢复发

E.周围神经病理检查发现慢性脱髓鞘改变