题目内容

翻译的初级产物中能被磷酸化修饰的氨基酸是

A. 丝氨酸
B. 脯氨酸
C. 酪氨酸
D. 赖氨酸

查看答案
更多问题

src基因是()

A. 转录因子
B. 抑癌基因
C. 两者都是
D. 两者皆非

We do not know who first set a broken leg, or launched a seaworthy boat, or calculated the length of the year, or ploughed the field; but we know all about the killers and destroyers. People think a great deal of them, so much so that on all the highest ills in the great cities of the world you will find the figure of a conqueror or a general or a soldier. And I think most people believe that the greatest Countries are those that have beaten in battle the greatest number of other countries and ruled over them as conquerors. It is just possible they are, hut they are not the most civilized. Animals fight; so do savages; hence to be good at fighting is to be good in the way in which an animal or a savage is good, but it is not to be civilized.

A presentation has two important components: what you say and (51) you deliver it. The term delivery covers a wide (52) of featares of speaking and eye contact is one of them. The appropriate use of eye contact (53) from one culture to another. In some cultures, women are (54) to lower their eyes in most communication (55) ; in others, younger people must keep their eyes lowered when addressing older people. (56) in the United States, (57) you are addressing an individual, a small group of people, or a larger audience, you are expected to look at them. You do not have to stare (58) and continuously; (59) , it is appropriate when speaking to one person to (60) occasionally. In a small group you should look around at the different members of the group. (61) When addressing a larger audience, you should try to make eye contact with different people around the room. It is important to look at the (62) . Audience, not just the people in the center of the room, (63) you will probably have to turn your head and/or your body in order to make proper eye contact with people (64) at the sides of the room. If you look at the ceiling, you will give the impression that you are not interested in your audience. A speaker establishes friendly relationship with the audience mainly (65) eye contact, and good relationship is essential to the success of any speech.

A. Even
B. And
C. Thus
D. Or

Lonely Planet Sometimes it seems like we’re all friends on Facebook. But the sad truth is that Americans are lonelier than ever. Between 1985 and 2004, the number of people who said they felt lonely tripled, to 25 percent, according to Duke University researchers. Social isolation in all adults has been linked to sleep disorders, high blood pressure, and an increased risk of depression and suicide, says John T. Cacioppo, a neuroscientist at the University of Chicago. Though more Americans than ever are living alone, the connection between single -living and loneliness is in fact quite weak. "Some of the most profound loneliness can happen when other people are present," says Harry Reis, professor of psychology at the University of Rochester. Take college freshmen: even though they’re surrounded by people almost all the time, many feel incredibly isolated during the first quarter of the school year, Cacioppo says. By the second quarter, however, most freshmen have found social replacements for their high - school friends. So how many friends do you need to avoid loneliness There is no magic number. An introvert might need one confidante not to feel lonely, whereas an extrovert might require three, or four bosom buddies. Experts say it’s not the quantity of social relationships but the quality that really matters. "The most popular kid in school may still feel lonely," Cacioppo says. "There ore a lot of stars who have been idols and lived lonely lives. " Loneliness can be relative: it has been defined as an emotional response to a perceived discrepancy between a person’s desired levels of social interaction and the contact they’re actually receiving. People tend to measure themselves against others, feeling particularly alone in communities where social connection is the norm. Social- networking sites like Facebook and My Space may provide people with a false sense of connection that ultimately increases loneliness in people who feel alone. "These sites should serve as a supplement, but not replacement for, face - to - face interaction. Just being able to engage genuinely and politely with your neighbors is a better fix than texting could ever effect for mental stability. " Cacioppo says. According to the passage, what is Cacioppo’s ideas about online social- networking

A. It can provide face to face communication.
B. It is a good way to gain social connection.
C. It is not as effective as a genuine chat with neighbors.
D. It is a good supplement to authentic interaction.

答案查题题库