HBV基因组负链上含有() A.S基因 B.X基因 C.P基因 D.C基因 E.pr

题型:多项选择题 X型题

问题:

HBV基因组负链上含有()

A.S基因

B.X基因

C.P基因

D.C基因

E.pre-S1基因

考点:预防疾控微生物检验技术肝炎病毒肝炎病毒题库
题型:多项选择题 X型题

肾病综合征伴发血栓最常见的是()。

A.下肢静脉血栓

B.肺血管血栓

C.肾静脉血栓

D.冠状血管血栓

E.脑血管血栓

题型:多项选择题 X型题

为男患者插导尿管,应提起阴茎与腹壁成()

A.15°

B.30°

C.50°

D.60°

E.90°

题型:多项选择题 X型题

阅读以下文字,完成以下问题。
人们在夏季出门时,大多担心会患皮肤癌,所以夏天要买高防晒值的防晒霜、防晒服、遮阳伞,很多国家的操场上还盖上了遮阳篷。
事实上,太阳光对人体健康非常有利,且必不可少,人体中维生素D(VD)的一部分获取就应归功于太阳光。人体一是通过食用鱼油、乳制品等食物获取,二是皮肤细胞利用致癌的紫外线把前体化学物转化成VD,经肝脏和肾脏进一步合成活性VD。
活性VD最广为人知的作用是帮助肠道吸收钙。钙不仅用于连接骨细胞,在神经、肌肉和新陈代谢指令中也具有非常重要的作用。当血钙浓度下降,血液就会从骨骼中提取钙,以防止神经和肌肉失灵,这就是为什么缺VD容易患软骨症。但钙的新陈代谢并不是VD的惟一作用。最新研究表明活性VD对抑制细胞分裂有重要作用。如果缺乏VD,细胞分裂就会失控,而细胞分裂失控会毫无疑问地导致癌症。美国科学家在对美国各地癌症死亡率的图表分析时惊讶地发现,很多常见癌症包括结肠癌、乳腺癌和前列腺癌在东北部地区的死亡率明显高于其他地区,而东北部地区寒冷,阳光照射强度和时间都不及南方各地。因此科学家提出,在户外活动时间长、接受光照较多的人,阳光为他们的皮肤中制造了更多的有防癌作用的VD。科学家分析比较了癌症死亡率图表与各地区的紫外线照射强度,数据显示、紫外线强度与13种癌症的死亡率有很大关联。科学家的结论是,美国每年至少有23600人因缺少阳光或光照不足而患癌死亡。
英国一个研究小组记录了355名男性一生的日照时间后发现,他们中1/4接触阳光最少的人与1/4接触阳光最多的相比,前者患癌症的几率是后者的3倍。
目前人们流行服用维生素,但这一领域的有关专家认为,服用一颗以上的多种维生素是不可行的,因为药丸中的其他维生素,特别是VA,很快会达到有害剂量,而单纯服用VD,过量摄入也是有害的。但你永远不可能摄入过量的阳光,因为皮肤制造VD,本身就有防止VD过量的反馈途径。
研究还指出,接触阳光还有一些好处是无法靠服用维生素获得的。皮肤细胞利用紫外线还可制造其他化学物质如光甾醇,速甾醇等,这些甾醇被认为对人健康有益,此外,紫外线有温和的消毒杀菌作用,可以杀死人体皮肤的一些病毒和细菌,阳光中有催眠因子,能调节人体生物节律,阳光能为人体提供合理健康因子,这些都是服药无法达到的。
综上所述,强烈的太阳光虽然会使皮肤变黑,影响皮肤的细嫩美观,但合理、适宜的晒太阳对人体生理健康,心情舒畅是大有益处的。

根据文章内容,不属于人们去晒太阳的原因是( )。

A.阳光能为人体皮肤制造更多的有防癌作用的物质

B.阳光能为人体提供合理的健康因子

C.阳光具有消毒杀菌作用

D.阳光使人的皮肤变成古铜色,看上去健康

题型:多项选择题 X型题

Chinese writer Mo Yan’s Nobel Prize for Literature might ignite an explosion of global interest in Chinese literature and lead to more titles translated into English, European experts say.

“Hopefully, the award means more people will read Chinese literature and more works will get translated,” says Michel Hockx, professor of the Languages and Cultures of China and Inner Asia from University of London. “Many very good Chinese writers have been accepted globally for a long time already. Mo Yan is probably the most translated Chinese writer alive, with at least five of his novels made available in English over the past 20 years.”

Jonathan Ruppin, web editor of bookseller Foyles, says Mo’s win coincides with growing interest in Chinese literature and recognizes the talents of a distinctive and visionary(富于幻想的)writer. “We are very excited by the fact that English translations of more of his books should now become available,” Ruppin says. He made the comment after Mo became the first Chinese citizen to win the Nobel Prize for Literature in its century-long history.

As East-West cultural exchange has been booming, Chinese literature has been attracting growing attention in recent years. Hockx explains, “It’s mainly because there are many more opportunities for Chinese writers to visit other countries, to publish their works outside China and to interact with readers abroad. At the same time, more and more people globally are learning Chinese and taking an interest in the Chinese language and culture.”

University of Oxford lecturer in modern Chinese literature Margaret Hillenbrand says, “The obvious reason for the growing global presence of Chinese literature is the growing global presence of China itself. People have come to realize that there is a serious knowledge deficit between China and its international counterparts — in particular, China knows incomparably more about Europe and America than the other way round — and reading Chinese literature is an effective, simple means of solving that gap.”

小题1:The underlined word “ignite” in Paragraph 1 probably means  “________”.

A.start out

B.burn up

C.set off

D.appeal to小题2:Which of the following is true according to the passage?

A.Chinese literature has spread with the development of China.

B.The Nobel Prize for Literature has a history of hundreds of years.

C.In the past, no Chinese writers were accepted outside China.

D.Foreigners know about China mainly by reading Mo Yan’s works.小题3:Chinese literature has been attracting growing attention mainly because

A.Chinese writers have been writing more and more books in English

B.the Chinese language has become the most widely used language in the world

C.the Chinese government attaches great importance to literature

D.the cultural communication between China and western countries has developed小题4:How do you understand the underlined sentence in the last paragraph?

A.China knows more about Europe and America than before.

B.China knows more about Europe and America than they know about China.

C.China, Europe and America know one another more than before.

D.Compared with America, China knows more about Europe.

题型:多项选择题 X型题

某物业的购买价为100万元,其中50万元为银行抵押贷款,期限10年,年利率12%,按年等额偿还,如该物业年净经营收入为30万元,则该物业投资的还本付息比率为()。

A.4.00

B.0.15

C.0.19

D.3.39

更多题库