在数据库管理技术的发展过程中，经历了人工管理阶段、文件系统阶段和数据库系统阶段，其中

历史剧《梧桐雨》取材于（　　　）

A．唐代传奇小说

B．汉元帝的历史故事

C．白朴的乐府

D．白居易的诗歌

特殊鉴定合格的锅炉，可以继续使用一个厂修期。

The common cold is the world’s most widespread illness, which is plagues that flesh receives.
The most widespread mistake of all is that colds are caused by cold. They are not. They are caused by viruses passing on from person to person. You catch a cold by coming into contact, directly or indirectly, with someone who already has one. If cold causes colds, it would be reasonable to expect the Eskimos to suffer from them forever. But they do not. And in isolated Arctic regions explorers have reported being free from colds until coming into contact again with infected people from the outside world by way of packages and mail dropped from airplanes.
During the First World War soldiers who spent long periods in the trenches, cold and wet, showed no increased tendency to catch colds.
In the Second World War prisoners at the notorious Auschwitz concentration camp, naked and starving, were astonished to find that they seldom had colds.
At the Common Cold Research Unit in England, volunteers took part in Experiments in which they gave themselves to the discomforts of being cold and wet for long stretches of time. After taking hot baths, they put on bathing suits, allowed themselves to be with cold water, and then stood about dripping wet in drafty room. Some wore wet socks all day while others exercised in the rain until close to exhaustion. Not one of the volunteers came down with a cold unless a cold virus was actually dropped in his nose.
If, then, cold and wet have nothing to do with catching colds, why are they more frequent in the winter Despite the most pains—taking research, no one has yet found the answer. One explanation offered by scientists is that people tend to stay together indoors more in cold weather than at other times, and this makes it easier for cold viruses to be passed on.
No one has yet found a cure for the cold. There are drugs and pain suppressors such as aspirin, but all they do is to relieve the symptoms.

Which of the following does not agree with the chosen passage

A. The Eskimos do not suffer from colds all the time.
B. Colds are not caused by cold.
C. People suffer from colds just because they like to stay indoors.
D. A person may catch a cold by touching someone who already had one.

关于票据签章的规定，以下（）叙述不符合我国《票据法》的规定？

A、甲公司签发了一张转账支票，其在支票上的签章可以是甲公司的公章或者财务专用章，或者是甲公司的法定代表人的签章。

B、王某签发了一张银行支票，王某的签章必须与在银行预留的签章一致。

C、陈某的笔名“孤独求败”广为人知，本名反而知道的人很少，陈某在票据上签章时可以使用“孤独求败”这一笔名。

D、乙公司签发了一张银行承兑汇票给丙公司，汇票上没有乙公司的签章，但是丙公司可以以与乙公司之间签订的买卖合同证明该汇票系乙公司签发，汇票有效。

工作组以太网用于接入网环境时，需要特别解决的问题有（）

A、以太网远端馈电

B、接入端口的控制

C、用户间的隔离

D、MAC层的机制