( )是指如何保证信息在网络传输的过程中不被泄露与不被攻击。

If there are much more people in the world, there must have more food to feed the people. But food is already a problem in today world. One-third of the world's population is starving, because there is not enough food. Ten thousand people died of hunger every day in some parts of the world. But in others parts of the world, people become ill or die, because they eat too much food, and they are very fat. Some countries have no food, but the others have too much, and they throw them away. How can tomorrow's world feed its people? The world needs produce more food than it does now.

在保证项目完整性的前提下，甲建设单位将工程的设计业务分别委托给了乙、丙两家设计单位，并选定乙设计单位为主体承接方，负责整个工厂程项目设计的总体协调。关于该项目的设计责任，下列说法中，正确的是（）。

A．丙设计单位直接对甲建设单位负责

B．丙设计单位仅对乙设计单位负责

C．乙设计单位就整个项目的设计任务负总责

D．乙、丙设计单位对甲建设单位承担连带责任

预激综合征合并快速心房颤动的首选治疗药物是（）。

A.洋地黄 

B.利多卡因 

C.地尔硫 

D.普罗帕酮 

E.维拉帕米

政党报纸的特点：（），新闻少；（），可信性差；（），销量低；，漫骂攻讦