相关试题
【判断题】
控制较高的温度是为了把酸性气中氨完全燃烧掉
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控制焚烧炉后烟道气中的氧含量既为了确保H2S燃烧完全，又为了减少装置能耗
【判断题】
废热锅炉壳程和硫冷器壳程的冲洗介质是除氧水
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汽包在开工期间先将蒸汽放空是为了排尽锅炉内所含的空气
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安全阀投用前必须检查安全阀本体铅封是否完好并检查校验日期是否正确
【判断题】
空气中有70％的氮气，所以氮气不会引起窒息死亡
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溶剂再生塔压力高的原因可能是由于酸性气后路不畅
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溶剂再生退溶剂时要经常注意检查液面，防止因液面抽空损坏泵
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二氧化硫易溶于水，而生成亚硫酸，亚硫酸是中强酸，对设备腐蚀很严重
【判断题】
硫磺催化剂不能在雨、雪、雾等天气时装填，主要原因是防止催化剂吸潮粉化
【判断题】
在装填催化剂前，必须进入反应器内，按设计高度划出各层瓷球及催化剂的装填标记线
【判断题】
硫磺回收装置停工钝化清洗的目的是防止打开设备后硫化亚铁自燃
【判断题】
装置公用工程必须在装置进料以前就引进装置
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“四不开车”原则中有装置检修质量不好不准开车
【判断题】
装置长周期运行超过1年，安全阀可以延期到停工校验
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更换压力表时，压力表量程应与原表相同，高温部位应选用耐温的
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就地液面计投用时先开下引出阀，再开上引出，有利于液面计中赶走气泡
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有时贮罐在太阳爆晒下即着火，那是因为FeS的自燃引起的
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燃烧的主要特征是：放热、发光、火焰。因此，物质燃烧时一定能够看到可见光
【判断题】
溶剂再生退溶剂时要先液面抽空后，再停溶剂循环
【判断题】
酸性气含有大量烃，不仅影响操作，而且容易出黑硫磺
【判断题】
“四不开车”原则中有装置安全不好不准开车
【判断题】
开工氮气置换空气的目的是防止易燃物料接触发生爆炸
【判断题】
电打火器使用前应先将点火棒插入点火孔，再点火
【判断题】
发现压力表指示超过红线，但未超过量程，仍可以使用
【判断题】
就地液面计投用时必须检查放空阀是否关闭，然后才可以开引出阀
【判断题】
对于组分挥发度相差较大、分离要求不高的场合，可采用平衡蒸馏或简单蒸馏
【判断题】
装置漏油、漏瓦斯不准开车，漏水则无所谓
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采样时需要携带便携式硫化氢报警仪，装置正常巡检可以不带
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装置瞬间跳电，机泵会自启动，不需要操作人员去作调节
【判断题】
发生大风事故时，若管线未经过加固，有可能造成管线被拉断的情况
推荐试题
【填空题】
4.Although he was raised as a Christian, he’s not really very _________.
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5.You can distinguish between frogs ands toads蟾蜍 in the following way: frogs have _________bodies, long limbs, and a smooth skin, and toads have stouter bodies, short limbs, and dry skin.
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6.From the airplane window I could see a _________of city streets.
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7.Aunt Pat smiled at her little niece and _________her to eat.
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8.Dr. Rich Hamilton is planning his own World Wide Web _________on the Internet to provide assistance to anyone who asks for medical help.
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9.It is difficult to estimate the number of people doing part-time jobs _________
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10.The president _________his foreign minister, Mr. Burns, to act as representative to the international conference to be held in Tokyo next month.
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11.Advances in telecommunications have meant that it is just as easy to work from a computer _________at home as it is from a town center office.
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12.Until the new gym is built, you have no option but _________existing buildings which may or may not suit your immediate目前的requirements.
【填空题】
1.According to some scientists, global warming _________the survival of the whole human race.
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2.The number of visitors from parts of Scotland not including the Edinburgh area was, in fact, relatively small19%, and exceeded the number of overseas visitors16%_________.
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3.The early Spaniards established a chain of mission _________the local population along the San Antonio River.
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4.It was common practice then that when the store owners wanted to go on vacation they simply _________
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5.As they didn’t have relatives or friends there they often _________around nearby malls when they got bored.
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6.To make a birthday card, you can simply cut out some funny or pretty pictures from magazines, _________them _________a piece of card and then write your message inside.
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7.She picked up the receiver and, _________ asking the caller to hold on, went off to tell Jack that he was wanted on the phone.
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8.To relax himself for a little while, he rose from the computer desk, walked across the room towards the window and stretched both arms upwards and _________.
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9.The new product has a pair of small loudspeakers fitted inside, which you can easily _________ your computer’s sound card.
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10.Music in fact is a _________language of a non-verbal nature which is rich in expression.
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11.This _________is designed to show at a glance how many rooms have been rented out and how many are still available.
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12._________ glorious sunshine, the boundless stretch of corn fields looked an impressive sight.
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1.The cook put the meat on a plate, _________it with salt and pepper, wrapped up the plate in aluminum foil铝箔 and then placed it in the oven to roast.
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2.Every waking moment we talk to ourselves about the things we experience. Our self-talk, the thought we communicate to ourselves, _________control the way we feel and act.
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3.John made everyone laugh when he got the words _________and referred to himself as “my husband’s wife”.
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4.You can’t live a perfect day without doing something for someone who will perhaps never be able to _________you.
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5.Because the Earth is a sphere, sailors _________only can view other ships to a distance of about 13 miles before those ships seem to disappear into the horizon.
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6.Johnson dismissed _________ideas lightly as no good on several occasions.
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7.One tends to believe whatever one repeats to oneself sufficiently often, whether the _________be true or false.
【填空题】
8.Susan told me numerous times how her sister _________children.
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9.I don’t know what my roommate is up to because he does everything _______________, either when I am away or when I am asleep.
【填空题】
10.For economic reasons, shipbuilders have designed vessels___ that can be loaded and _________in a minimum amount of time with minimum labor.
【填空题】
11.Laugh, and the world laughs with you; _________, and you weep alone.
【填空题】
12.A national debate is now _________about the manner in which we as a society should protect our natural resources.
【单选题】
___是湿润的纤维脱水后形成的薄片型材料。
A. 安全线
B. 安全纤维
C. 纸张
D. 水印
【单选题】
纸张最核心的材料是___,在它的基础上再通过添加其他配料使其具备不同的性质。
A. 纤维
B. 安全纤维
C. 纸浆
D. 水印
【单选题】
安全纸张以___为主要的纤维来源,占90%以上。
【单选题】
___是指在造纸生产过程中用改变纸浆纤维密度的方法制成的有明暗纹理的图形或文字。
A. 安全线
B. 安全纤维
C. 水印
D. 防伪彩点
【单选题】
水印只有在___的条件下才能被清楚地观察到。
【单选题】
___伪造水印图案,就是将纸张浸入水中使之软化,然后用表面伪造有凹凸纹路图案的模版,在纸张表面伪造出所需的水印图案。
A. 印刷法
B. 模压法
C. 显影法
D. 插入法
【单选题】
安全线中的缩微文字,只有在___条件下才可以清晰看到。
