在操作DCS系统时，不允许操作工改变的是（）。A、PID参数 B、阀位值 C、正反作

下列各项中，没有语病的一项是 [ ]

A．当今世界，自主知识产权所占比重是衡量一个国家科学发展水平的标志，而科学技术进步与否是国家富强的标志。

B．2月3日凌晨零时发生的沈阳皇朝万鑫国际大厦火灾事故的原因，是由燃放烟花引发外墙可燃物燃烧引起所致。两名犯罪嫌疑人已被警方采取强制措施。

C．不久前正式发布的2011年中央一号文件，是新中国成立以来中央首次全面系统地部署水利改革发展工作，并将水利提升到关系国家安全的战略高度的重要文件。

D．外交部发言人洪磊8日在答记者问时表示，中国尊重苏丹南方公投结果，希望双方本着互谅互让，继续通过对话与协商解决悬而未决的问题，维护苏丹的和平与稳定。

面神经的哪一分支与眼睑闭合有关（）。

A、颞支

B、颧支

C、颊支

D、下颌缘支

E、颈支

通过交谈或问卷的方法了解一些人对某一事件的感受、态度和行为，在医学心理学的研究方法中属于（）

A.调查法

B.临床观察法

C.个案法

D.实验法

E.心理测验法

A volcanic eruption in Iceland has sent ash across northern Europe. Airlines have stopped or changed the flights across the Atlantic Ocean, leaving hundreds of passengers stuck in airports.
Grimsvotn is one of the largest active volcanoes in Europe. What makes Grimsvotn different is that it lies under a huge glacier(冰川) of ice up to 12 meters thick. The hot volcano heats up the ice above it, which then forms a layer(M) of water between the glacier and the volcano. This layer of water puts pressure on the volcano ,keeping it stable. As the water flows out from under the glacier, the pressure Rifts. The lava(岩浆) from the volcano then comes up to the surface. This is exactly what has happened today.
Now, airlines have to make changes to their flights so as not to fly through the clouds of volcanic ash. According to KLM, one of Europe’s biggest airlines, airplanes cannot go under the cloud or over it. Going through the cloud can result in ash getting stuck in the airplane’s engines, causing damage to the plane.
The eruption has also caused problems for animals in Iceland. The volcano left ash and sharp, glass-like rocks all over the countryside. Farmers are keeping their animals inside to stop them from eating ash-covered grass or the sharp objects.

Which of the following is the result of the volcanic eruption

A．People stop traveling in Europe.

B．Airlines suffer from the loss of planes.

C．It becomes dangerous for animals to eat outside.

D．Farmers have lost many of their animals.

企业应怎样制定人力资源政策？