题干

如图为某真核细胞内基因控制蛋白质合成的示意图,请据图回答问题:

上一题 下一题 0.0难度 选择题 更新时间:2018-09-12 10:11:24

答案(点此获取答案解析)

同类题1

阅读理解

 Secrets of Web Travel Sites

Booking a trip on an online travel siteis convenient, but comes with its own set of problems.

1 They who's on a Mac and who's on a PCand who's going to spend more.

Last year, US travel research companyOrbitz tracked people's online activities to test out whether Mac users spendmore on travel than PC users. On average, Mac users lay out US$20-30 more pernight on hotels and go for more stars. according to the Wall Street Journal. Asa result, online• travel sites show these users more expensive travel optionsfirst. To avoid inadvertently paying more, sort results by price.

 Their software doesn't always hook up to thehotel's system.

A guaranteed reservation is almostimpossible to come by anywhere — but the risk of your flight or hotel beingoverbooked increases with third-party providers. The middle-man's softwareisn't immune to system errors, so always call the hotel or airline to make sureyour booking was processed.

 Don't be fooled by packages: Often, they'relow-end items grouped together.

Ever notice how travel sites recommend ahotel, a rental car, and tour package all in one click? These deals usuallyfeature travel that no one wants, like flights with multiple layovers.

Check the fine print.

 You could miss out on loyalty points.

Third-party providers can get betweenyou and frequent flyer miles or points. Many hotel loyalty programmes don'trecognise external sites, others award only minimum points and exclude specialoffers, like double points on hotel stays.

 Once your trip is purchased, you're on yourown.

An online travel agency can't provideassistance the same way an agent can if a flight is cancelled or a room issubstandard. Basically, when you arrive at the airport or hotel, you're justanother client who booked at the lowest rate.

同类题3

阅读下面的文字,完成下面小题。

    中华是礼仪之邦,礼是中国文化之心。流传至今的儒家“十三经”中有三部礼学经典,习称“三礼”,一部是《仪礼》,记述周代冠、婚、丧、祭诸礼的仪式;另一部是《周礼》,记载理想国的官制体系;还有一部就是《礼记》,是孔门七十子后学阐发礼义的文集,凡四十九篇,虽以思想隽永、说理宏通见长,但亦不乏细节描述。《礼记》全书主要有语录、条记、议论等形式,内容贴近生活,文字相对浅近。

    今人读《礼记》,至少可以收获礼仪规范。礼在社会生活层面属于行为规范,因而具有鲜明的可操作性的特点。《礼记》记载了许多言谈举止方面的细节,尽管时代不同了,但其中不少内容依然可以继承。例如《礼记》提到礼仪场合中的仪容仪态时说,“足容重”,步履要稳重;“手容恭”,拱手要高而端正;“目容端”,目光不可睇视;“口容止”,嘴形静止不妄动;“声容静”,不咳嗽、打喷嚏,哕咳;“头容直”,头部正直,不左右倾斜;“气容肃”,不喘大气;“色容庄”,神色庄重。《礼记》还提及各种礼仪禁忌,如“毋嗷应”,不要用号呼之声回应对方的呼唤;“毋怠荒”,体态要整肃,不可懈怠;“坐毋箕”,坐着,不可将双腿向两侧张开;“暑毋褰裳”,即使是暑天,也不要将裳的下摆向上撩起。这些都是文明时代民众必备的知识。

    如何得体地访客、与尊长相处,也是《礼记》多次谈到的内容。《礼记》说:“将上堂,声必扬。户外有二屦,言闻则入,言不闻则不入。”拜访他人,即将上堂时,要抬高说话声,旨在使室内的主人知道客人已到,而有所准备。如果房门口有两双鞋,房内的说话声清晰可闻,就可以进去;如果说话声听不到,说明他们的谈论比较私密,此时不可贸然进入。《札记》还说“毋侧听”,就是不要耳朵贴墙偷听别人谈话,这样做很不道德,可见古人把尊重他人隐私作为做人的原则。

    《礼记》还屡屡谈及在尊长身旁陪坐时的注意事项,如:“长者不及,毋傀言”,长者还没有谈及的话题,不要插嘴;“正尔容,听必恭”,听长者说话,要端正容貌,虚心恭听;“毋剿说,毋雷同”,自己发言时,要表达主见,不要总是袭用别人的说法,处处与人雷同。《礼记》还说,在先生身旁陪坐,“先生问焉,终则对”,先生有所询问,要等先生说完后再回话,抢答是失礼的行为。“请业则起,请益则起”,向先生请教学业,或者没听懂,希望先生再说一遍(请益),都要起身,不能坐着,以示尊师重道。

    《礼记》中有许多格言,立意深刻,堪称人生准则,是引领人们修身进德、勉为君子的指南,而又朗朗上口,读之令人眼睛一亮,足以铭之左右,终身拳拳服膺。

    在中国传统文化中,“礼”是内涵最大的概念,相当于西方人所说的“文化”,体系相当庞大,许多人对此不能理解,如果你读过《礼记》,就不会再有疑虑。若逐篇细读,如在纲,有条不紊,有助于从源头上把握中国文化体系。

(节选自《光明日报》,有删改)