试述对蒸汽吊车锅炉的保养应注意哪几点？_爱下问搜题

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问题问答题简答题

试述对蒸汽吊车锅炉的保养应注意哪几点？

答案

参考答案：①制造和更换锅炉板时，焊接前要预热，热加工后要正火，尽量防止或减少冷加工硬化现象的发生；

②锅炉洗修时，要严格掌握落火，减温，冲洗、点火等程序，避免冷空气的侵袭；

③运用中，司机司炉要密节配合，提高焚火，快速投煤，及时关闭炉门清炉和落火也要慎重。

完形填空

完形填空(共20小题,每小题1.5分, 满分30分)
I’ll never forget May 12, 2008, we were having classes at Beichuan Middle School , Sichuan Province, when a huge 36 hit the area.
At about 2:28 p.m, our 37 , Mr.Wang, was teaching us singing on the fourth floor on the teaching building. 38 we felt the building shaking violently. It was an earthquake! Our building starting to 39 . It was too late to rush out to the 40 . We were told to hide under the desks. 41 later, the whole building fell down. We were 42 in ruins. We couldn’t move at all. No one could really imagine at that split second, how much pain we had 43 or how desperate(绝望的) we felt as we waited to be 44 . I heard Mr. Wang calling our names again and again… .
Hours later, some people came to rescue and 45 of us were saved.
Later, I 46 this huge earthquake scaled 8.0 magnitude. It hit several provinces, including Sichuan, Gansu and Shanxi. So far it has 47 more than 80,000 and injured 360,000. My hometown ----Beichuan was 48 the worst-hit areas. Our school , which was 49 filled with vigor(活力) and laughter, was a dead valley.
Words after such a 50 could appear nothing but empty and pointless. So many people’s lives were taken away, so much 51 was done and the whole city was 52 . Beichuan has become a history.
Now , some of my classmates and I were 53 to study in a middle school in Jiangsu Province. I still 54 dreaming and still strive for a better future: to make our homes beautiful yet 55 .
May victims rest in peace. May survivors live to be stronger.

单项选择题

阅读下面短文，回答下 * * 道题。
写作是将意化思想变为物化思想的过程。写作学是一门具体科学，而不是部门科学(如语言学、思维科学等)。写作学所研究的书面表达现象是纷繁复杂的社会现象中一个很具体、很单一的方面，所要解决的问题是科学领域诸多问题中一个具体而单一的问题。因此，写作学不应也不可能发展成为一门独立的，与语言学、思维科学等并列的部门科学。
写作离不开语言和思维，但语言和思维是写作的工具而不是实质。因而把写作学归属语言学或思维科学都是不适当的。写作学应归入表达学，表达学又称表意学，是一门亟待建立的社会科学，它研究人如何借助语言文字将其思想或感情表达出来。表达学要运用哲学、人类学、语言学、心理学、社会学、思维科学、信息论、控制论等学科的研究成果和方法来研究表达的本质和概念、表达的过程和规律、意思的形成与组合、表达媒体与符号系统的形成及其在表达中的地位和作用、表达与社会各系统各领域的关系等。表达学的两个基本理论分支是演讲学和写作学，前者是口头表达科学，后者是书面表达科学。

根据文意，“将意化思想变为物化思想”，其表达方法是______。

A．书面表达和口头表达

B．思维和语言表达

C．书面表达

D．口头表达