问题 单项选择题

人机工程学中核心是()。

A.工作效率

B.机器

C.工作环境

D.人

答案

参考答案:D

问答题

某水泥厂拟新建一条新型干法水泥生产线及其配套设施。生产设施主要包括厂房建筑、压缩空气站、物料储运系统、供配电系统、新建道路、一座12000km余热发电机组等。水泥生产过程主要分为三个阶段生料制备、熟料煅烧和水泥粉磨。生料制备是将生产水泥的各种原料按一定的比例配合,经粉磨制成料粉(干法)的过程;熟料煅烧是将生料粉在水泥窑内熔融得到以硅酸钙为主要成分的硅酸盐水泥熟料的过程;水泥粉磨是将熟料深加工适量混合材料(矿渣),共同磨细得到最终产品——水泥的过程。 其生产工艺流程主要包括如下几个方面 (1)石灰石储存、输送及预均化卸车后的石灰石由胶带输送机送到碎石库储存,按一定比例出库送至预均化堆场的输送设备上。预均化堆场采用悬臂式胶带堆料机堆料,采用桥式刮板取料机取料。 (2)原料调配站及原料粉磨原料调配站将原料按一定比例配和后由胶带传送机送入原料磨。原料粉磨采用辊式磨,利用窑尾预热器排出的废气作为烘干热源。 (3)生料均化,储存与人窑。 (4)原料输送与煤粉制配。 (5)熟料烧成与冷却熟料烧成采用回转窑,窑尾带五级旋风预热器和分解炉,熟料冷却采用篦式冷却机,熟料出冷却机的温度为环境温度的+65%。为破碎大块熟料,冷却机出口处设有一台锤破碎机。 (6)废气处理从窑尾预热排出的废气,经高温风机一部分送至原料磨作为烘干热源,另一部分送入增湿塔增湿降温后,直接进入电收尘器净化后排人大气。 (7)熟料储存及运输。 (8)水泥调配熟料、石膏、矿渣按比例配合经胶带输送机送至水泥磨。 (9)水泥粉磨采用球磨机,磨好的水泥料送入高效洗粉机,送出的成品随气流进入布袋收尘器,收不来的成品送人水泥库。 (10)水泥储存及散装。 (11)辅助工程余热发电系统和压缩空气站。 请根据给定的条件,解答以下问题 (1)对该建设项目存在的主要危险、有害因素进行辨识,并分析其产生原因。

阅读理解

Brenda Bongos was a happy, artistic girl. She had one big ambition—to play the drums in a band. But one big obstacle lay in her way. To be good enough to play in a band, Brenda had to practice a lot, but she lived next-door to a lot of old people. Many of them are sick. She knew that the sound of beating drums would really get on their nerves. So, she had tried playing in the strangest places: a basement, a kitchen, and even in a shower. But there was always someone it would annoy.

One day, while watching a science documentary on TV, she heard that sound cannot travel in space, because there's no air. At that moment, Brenda Bongos decided to become a sort of musical astronaut.

With the help of a lot of time, books and work, Brenda built a space bubble. This was a big glass ball connected to a machine which sucked out all the air inside. All that would be left inside was a drum kit(成套设备) and a chair. Brenda got into the space suit she had made, entered the bubble, turned on the machine, and played those drums like a wild child.

It wasn't long before Brenda Bongos came very famous. Many people came to see her play in her space bubble. Shortly afterwards she came out of the bubble and started giving concerts. Her fame spread so much that the government suggested that she be part of a unique space journey. Finally, Brenda was a real musical astronaut, and had gone far beyond her first ambition of playing drums in a band.

Years later, when asked how she had achieved all this, she thought for a moment, and said: ''If those old people next – door hadn't mattered so much to me, I wouldn't have found a solution, and none of this would have ever happened.''

小题1:Why did Brenda try to play in the strangest places?

A.Because she didn't want others to hear her play.

B.Because she didn't mean to disturb others.

C.Because she didn't have her own room.

D.Because she didn’t like her neighbors.小题2:Brenda started to give concerts _______.

A.after she practiced in her space bubble

B.when she became part of the unique space journey

C.after she became a real musicalastronaut

D.when people came to see her in the space bubble小题3:Brenda became famous because _______.

A.she was good at music and science

B.she became a real musical astronaut

C.she invented a special way of practice

D.she played well and had a talent小题4:Which of the following can be used to describe Brenda?

A.Kind, hardworking and clever.

B.Brave, kind and hardworking.

C.Lovely, brave and kind.

D.Nervous, kind and clever.小题5:It can be inferred from the text that: " _______".

A.He laughs best who laughs last

B.It's never too old to learn

C.Two heads are better than one

D.One good turn deserves another