企业所有者权益资金与债务资金各占50%，则企业( )。A．经营风险和财务风险可以相

写出“投掷两枚普通的硬币”中出现的一个随机事件：                       

                               .

细心的东东发现：夏天的鸡蛋比冬天的更容易变为“散黄”，但鸡蛋“散黄”后并未变坏，那么认为以下原因分析正确的是[ ]

A．蚊虫叮咬的结果

B．气温较高，蛋黄膨胀开裂

C．拿来拿去振动的结果

D．气温较高，蛋黄与蛋白扩散作用加剧的结果

The presentation layer is concerned with the （）and semantics of the information exchanged between two systems. The processes in two systems are usually exchanging information in the form of character （）, numbers, and so on. The information should be changed to bit （） before being transmitted. Because different computers use different encoding systems, the presentation layer is responsible for （） between these different encoding methods. The presentation layer at the sender changes the information from its sender-dependent format into a common format. The presentation layer at the receiving machine changes the common format into its （） -dependent format.

The information should be changed to bit （）before being transmitted.

A．systems

B．characters

C．layers

D．streams

林肯曾说过“一部书引发的战争”，这部书指的是（）。

A.《汤姆叔叔的小屋》

B.《乱世佳人》

C.《艰难时代》

D.《战地钟声》

化工工艺过程一般有几个阶段组成？