问题 填空题

承运危险货物时,车站要按照()的规定,对品名、编号、类项、包装、标志以及“托运人记载事项”栏的内容进行检查。

答案

参考答案:《铁路危险货物运输管理规则》

单项选择题

阅读下面短文,回答下列问题。
在航天技术日益发展的21世纪,利用太空的特殊环境,制造真正的灵丹妙药以攻克威胁地球人的不治之症,不是无稽之谈。目前,激素、酶、抗体类特效药制剂都是通过选用哺乳动物细胞进行培养制取的,而在体外培养大量活细胞难度非常大。要使大量的细胞脱离原体后仍有生命功能,必须使它们依附他物,而且细胞之间互不干扰。没有可依附的物体表面,这些细胞不能存活,便谈不到制取有价值的生物制剂。生物学家通常让“培养细胞”分散依附在直径小于百万分之一英寸的特制塑料小球表面,将小球置于有培养介质液的罐中,使之吸收介质中的营养并进行新陈代谢。但是,在地球重力作用下,小球往往会沉降,依附在球面上的细胞也会“叠罗汉”,下层的细胞在成为饿殍的过程中产生着毒素,上层的细胞则因兼容并蓄而前景堪忧。
如果在太空中,上述情况便会发生逆转。失重,会使“培养细胞”保持旺盛的活力。失重环境最利于生物物质的分离与提纯。生物学家和医药学家最感兴趣的电泳技术的作用在未来的太空制药厂里可以得到尽如人意的发挥。电泳技术是将质量和电荷的比值不同的粒子在电场中分离的一种方法。利用这种方法既可分离不同组分的混合物,又能分离细胞和蛋白质,甚至从“衰老”的细胞群中分离“年轻”的细胞。在地面上,所有粒子都会同时受到电场力和重力的作用,电泳操作难度极大。当电力培养细胞或培养介质受热时,对流和沉淀现象将并发(往往以一种现象为主,如重力大于电场力,沉淀就将起主要作用)。对流或沉淀都会使已经分离的组分重新混合。克服此弊,需要创造失重环境。在“阿波罗一联盟”号飞船实验室中进行的电泳分离试验非常成功,从大约5%的肾细胞中分离出尿激素,其分离效率是地面上的6~10倍,而且质量极好。这种在地面上难以提取的尿激素是溶解血栓或凝血的特效药。航天飞机投入使用后,在机内空间实验室中多次进行了电泳试验,成功地从血浆中分离出激素、酶和蛋白质。太空生物制品专家K·威斯指出,在太窄实验室利用电泳技术生产血浆蛋白的效率要比地球上高700倍。
发展太空制药业或生物制品的前景是非常广阔的。疫苗制品的生产,人体细胞和白蛋白的提纯与制造,血红细胞生成素的配置……都可能成为高科技、高盈利的生产项目。有人估计,仅疫苗一项,每年的经济收益将超过15亿美元。更重要的是,地球上数以百万计的“绝症”患者也会因太空的灵丹妙药而起死回生。

对第一段画线文字的有关内容,理解不正确的一项是______。

A.地球重力作用破坏了“依附在球面上的细胞”的分散排布,使之出现叠压现象

B.居于上层的“培养细胞”,在得到营养的同时也吸纳了毒气,存活能力下降

C.在培养介质罐中,被压在下层的“培养细胞”死亡后,尸体腐烂不断释放毒气

D.地球重力使“培养细胞”的代谢物沉降在介质罐底部,细胞存活环境随之恶化

完形填空
My friend Tom came across an accident when driving in darkness. His legs were so hurt that he couldn’t move. What was           was that he found himself unable to ask for help—his mobile phone went out of       as a result of exhausted battery. Nothing could be done but          in the cold wilderness. It was 8 hours later that day broke and then the       of the rescue team.
It is almost          that he could stand the horror in the darkness for so long. Even more surprising was his       . “First of all I checked my   conditions and found myself not in danger. As there was no        to call for help, I leaned(斜靠)back in my seat trying my best to keep the wound from       . In this way I dozed(打盹)off.”
His story put an end to my regret for the         of an exploration that happened last year. A group of young men          to explore a mountain cave and got lost.         to find a way out in the dark cave they were frightened and ran anxiously without a sense of        . Finally, they fell dead in fear and exhaustion. According to the       team that found them, the place where they got lost was only about 10 meters away from the       of the cave. If they stayed on the spot when they lost their way and tried to      themselves, they would probably have sensed a faint light glowing(发出) not far away.
Don’t you think that you can compare it with       itself? When you meet with difficulties in life, you are lost in darkness. Focus that it’s unclear to you yet and you needn’t put up struggle     . It seems to be a negative attitude,     a person who can do so must have foresight as well as a great        in the first place.
小题1:
A.hopelessB.worseC.moreD.best
小题2:
A.serviceB.wayC.controlD.work
小题3:
A.cryB.lieC.waitD.sleep
小题4:
A.delayB.successC.teamD.arrival
小题5:
A.untrueB.unimaginable C.possibleD.useless
小题6:
A.plan B.decisionC.explanationD.excuse
小题7:
A.physicalB.mentalC.workingD.medical
小题8:
A.methodB.wayC.toolsD.strength
小题9:
A.rottingB.spreading C.bleeding D.running
小题10:
A.lossB.failure C.sadness D.disappointment
小题11:
A.had B.managed C.tried D.planned
小题12:
A.Willing B.UnableC.DeterminedD.Deciding
小题13:
A.hearingB.sightC.feeling D.direction
小题14:
A.rescueB.village C.local D.brave
小题15:
A.end B.topC.openingD.side
小题16:
A.saveB.helpC.stop D.calm
小题17:
A.adventureB.work C.life D.mankind
小题18:
A.reallyB.immediatelyC.carefully D.hopefully
小题19:
A.and B.so C.butD.while
小题20:
A.courageB.imagination C.thought D.opinion