题目内容
（请给出正确答案）
[单选题]
持家（housekeeping)基因：（)。
A.编码只在特定组织中需要的蛋白
B.上述表述都对
C.组成型表达
D.含有高度甲基化的CpG岛
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题目内容
（请给出正确答案）
A.编码只在特定组织中需要的蛋白
B.上述表述都对
C.组成型表达
D.含有高度甲基化的CpG岛
答案
更多“持家（housekeeping)基因：（)。”相关的问题
第1题
A.Is there any body inside？
B.Housekeeping
C.Housekeepin
D.May I come in？
E.I'm room attendant.
第4题
A.节俭是安邦定国的法宝
B.节俭是诚实守信的基础
C.节俭是持家之本
D.节俭是维持人类生存的必需
第5题
Questions 20to 23are based on the following passage.
It’s usually a good idea to book rooms in fancy hotels well in advance. These hotels provide many extra services. You probably can count on having bathrobes,hair dryers,and a minibar in your room. Beware of minibars. You can be surprised when you pay your bill.
When you arrive,a doorman greets you,and a porter takes your bags. Tip the porter at least $1per bag. If the doorman calls a taxi for you, tip him $1. If he has to stand out in the rain,you might want to tip more.
The porter takes the bags to your room. Sometimes the desk clerk will direct you to the room,and the porter will follow with the bags. The porter or bellman will open and www.docin.com 6 show you the room. If you don’tlike the room,ask the porter to call the front desk about a replacement.
The next thing you should do,no matter what sort of hotel, is to find the emergency and fire exits. Check to see whether you need more towels, pillows, blankets, hangers,or an iron. If you do, call housekeeping right away. Calling late at night, when there is a reduced staff,can create difficulties and delays.
Fancy hotels have a concierge, in the European tradition. The concierge desk is generally located near the registration desk. Here you can obtain theater, concert, and sports tickets？ look at local restaurant menus and make dining reservations; and find out about car rentals, sightseeing tours,babysitters,and even traffic and weather conditions. A good concierge is a miracle worker who seems to know everything about everything.
20.What do you have to pay for after use at a fancy hotel according to the passage？
A.The iron
B.The bathrobe
C.The minibar
D.The hairdryer
Who is probably the person that takes your luggage to your room？A.The desk clerk
B.The porter
C.The bellman
D.The doorman
A concierge(Para,5)is probably someone who_______ A.babysits for hotel guests
B.works as a sightseeing guide for hotel guests
C.takes hotel guests to restaurants
D.provides hotel guests with information and services
Which of the following can you ask for more？ A.Pillows and blankets
B.Towels and TV sets
C.Hangers and keys
D.Curtains and lights
请帮忙给出每个问题的正确答案和分析，谢谢！
第6题
In the past, the working-class tended to be paid less than middle-class people, such as teachers and doctors. As a result of this and also of the fact that workers' jobs were generally much less secure, distinct differences in life-styles and attitudes came into existence. The typical working man would collect his wages on Friday evening and then, it was widely believed, having given his wife her "housekeeping", would go out and squander the rest on beer and betting.
The stereotype of what a middle-class man did with his money was perhaps nearer the troth. He was — and still is — inclined to take a longer-term view. Not only did he regard buying a house as a top priority, but he also considered the education of his children as extremely important. Both of these provided him and his family with security. Only in very few cases did workers have the opportunity (or the education and training) to make such long-term plans.
Nowadays, a great deal has changed. In a large number of cases factory workers earn as much, if not more, than their middle-class supervisors. Social security and laws to improve job-security, combined with a general rise in the standard of living since the mid-fifties of the 20th century, have made it less necessary than before to worry about "tomorrow". Working-class people seem slowly to be losing the feeling of inferiority they had in the past. In fact there has been a growing tendency in the past few years for the middle-classes to feel slightly ashamed of their position.
The changes in both life-styles and attitudes are probably most easily seen amongst younger people. They generally tend to share very similar tastes in music and clothes, they spend their money in having a good time, and save for holidays or longer-term plans when necessary. There seems to be much less difference than in previous generations. Nevertheless, we still have a wide gap between the well-paid (whatever the type of job they may have) and the low-paid. As long as this gap exists, there will always be a possibility that new conflicts and jealousies will emerge, or rather that the old conflicts will re-appear, but between different groups.
Which of the following is seen as the cause of class differences in the past？
A．Life style. and occupation.
B．Attitude and income.
C．Income and job security.
D．Job security and hobbies.
