请输入或粘贴题目内容
搜题
拍照、语音搜题，请扫码下载APP
题目内容
（请给出正确答案）
99% junk mail is thrown into the garbage bin without being opened.
A．Right
B．Wrong
C．Not mentioned
答案
更多“99% junk mail is thrown into the garbage bin without being opened.A．RightB．WrongC．Not ment”相关的问题
第1题
回答题：
Looking to help the environment？ Consider the following simple ideas.
Turn off electrical devices when they"re not being used.
Turning off， rather than leaving on stand-by， things like your TV and computer will save huge amounts of energy. With this， we can all help reduce the amount of carbon dioxide emitted into the earth"s atmosphere， thereby reducing pollution and global warming.
Share your ear.
Rather than traveling to work alone， why not arrange ear-sharing with one or more of your，friends or colleagues？ To give you an example， if you drive a fashionable ear， you will use more energy in a year than you would leaving your fridge open for seven years， or your TV on for thirty-two years ! Imagine the savings if you shared your ear with 2，3 or even 4 other people !
Refuse junk mail.
While we all complain about how much junk mail we get， we very rarely do anything about it. The mail continues to go straight from our letter-boxes into the garbage bin——with 99% of it not even opened. What can you do about this？ There are various websites where you can register to receive no junk mail. As well as saving time， you"ll also be doing a lot for the environment. Each year，100 million trees are used to produce junk mail.250，000 homes could be heated with one day"s supply of junk mail.
There are many other everyday changes you can make to help the environment. They will cost you nothing， and many will actually save you money! Why not give it a try？ We can all help，if we really want to.
By turning off a TV or computer that‘s not being used，you will save a lot of energy. 查看材料
A.Right
B.Wrong
C.Not mentioned
第2题
The only drawback of junk mail is that it wastes our time.
A．Right
B．Wrong
C．Not mentioned
第3题
A.Right
B.Wrong
C.Not mentioned
第4题
A．Because marketing groups have collected consumers' information for years.
B．Because marketing groups can send messages around the world for free.
C．Because people keep down junk mail to a manageable level.
D．Because it is cheaper to mail packages to large groups of people.
第5题
听力原文： Make millions with no work! Lose 5 kg overnight! Clear your credit history! The secrets to getting hot girls! Get out of debt!
Junk email messages like these, also known as spam, are familiar to anyone with an email account. On average, each email user received 1,300 spam messages last year, and that number is expected to increase to 3,900 by the year 2007.
Junk mail is nothing new. For years, marketing groups have collected consumer information, including addresses and phone numbers, and sold them as lists to interested advertisers. But with junk mail, the high cost of mailing packages to large groups of people kept it down to a manageable level. But with email, anyone With a computer and Internet connection can now send messages around the world for free.
But it's the people who receive spam who wind up paying. It is estimated that spam costs companies millions of dollars every year due to wasted time, connection costs and lost emails.
(33)
A．130.
B．3,900.
C．13,000.
D．1,300.
第6题
Everybody everywhere will be paying more for postal services next year, but one sector will be particularly hard hit. Direct-marketing companies rely on the postal system to carry out their business. These companies include catalog houses as well as sellers of mailing lists. Postal services account for a significant percentage of their costs.
Direct-marketing companies say the proposed increases in postal rates will hurt their industry and will likely even drive some into bankruptcy. "Our business is carried out almost entirely through the mail," says Esther Bergen, president of Mega Marketers, Inc., one of the largest direct-marketing companies in the country. "Of course these increases will hurt us. They will have a huge effect on the way we do business." Direct-marketing companies rely mostly on third-class mail, which is expected to have rate increases as high as 30 percent. Will this mean less junk mail arriving at your doorstep？ "Possibly," says Bergen. "But the more likely outcome is that the smaller companies, which will have more difficulty absorbing the costs of the rate increases, will go under, while the larger companies will stay in business and take over the markets now covered by the smaller companies. There will probably be some increases in prices of mail-order products, but not enough to drive the average consumer away."
The word "drive" in paragraph 3, line 2, is closest in meaning to
A．force
B．operate
C．transport
D．remove
第7题
raf-1基因编码Ser/Thr蛋白激酶可能在脊椎动物发育中起重要作用。在果蝇中，当这个基因的同系物缺失时，胚胎能正常发育过囊胚期，但此后的发育开始异常，产生一缺少后面四片段的平截胚胎。在脊椎动物中，成纤维细胞生长因子(FGF)增进中胚层诱导和后期发育。据认为Raf-1蛋白与FGF触发信号传导途径。Raf-1蛋白有一个Ser/Thr激酶区，即C末端半分子和一个在氨基末端的调节区，该区除非收到正确信号，否则会抑制激酶活性。
为了检验Raf-1的作用，你构建出一个你希望是负显性的cDNA，在ATP结合区改变了一主要的残基。这一突变了的cDNA编码的蛋白无激酶活性，命名为NAF(没活性的Raf)。从Raf-1cDNA到NAF、cDNA中制得RNA，分别注射或混合注射到二细胞期的蛙胚中以判断对蛙发育的影响，结果在表16-3-45中，某些注射后产生的元尾表型很明显(见图16-3-45)。
| 表16-3-45 R-1和NAF RNA注入2细胞胚胎 | ||||
| 注入 | 存活总数 | 表 型 | ||
| 正常 | 短尾 | 其他不正常 | ||
| raf-I RNA NAF RNA raf-I and NAF RNA Water uninjected | 94 80 93 101 80 | 75% 40% 73% 92% 99% | 0% 36% 5% 0% 0% | 25% 24% 22% 8% 1% |
第8题
A.junk ？
B.junk :error !
C.junk :parameter not set
D.junk
第9题
The Kind of Work Daddy Does
It is not surprising that modem children tend to look blank and dispirited when informed that they will someday have to "go to work and make a living. "The fact is they cannot visualiave what work is in corporate America.
Not so long ago, when a parent said he was off to work, the child knew very well what was about to happen. His parent was going to make something or fix something, The parent could take his offspring to his place of business and let him watch while he repaired a car or built a table.
When a child asked," What kind of work do you do, Daddy？" his father could answer in terms that a child could come to grips with. "I fix steam engines. ""I make horse collars."
Well, a few fathers still fix engines and build things, but most do not. Nowadays, most fathers sit in glass buildings performing tasks that are absolutely incomprehensible to children. Tile answers they gave when asked, "What kind of work do you do, Daddy？ "are likely to be very puzzling to the child.
"I sell space. ""I do market research. ""I am a data processor. ""I am in public relations. ""I am a systems analyst. "Such explanations must seem nonsense to a child. How can he possibly imagine anyone analyzing a system or researching a market？
Even grown men who do market research have trouble visualizing what a public relations man does with his day, and it is a safe bet that the average systems analyst is as puzzled about what a space saleman does at the shop as the average space salesman is about the tools needed to analyze a system.
In the common everyday job, nothing is made any more. Things are now made by machines. Very little is repaired. The machines that make things make them in such a fashion that they will quickly fall apart in such a way that repairs will be too expensive. Thus the buyer is encouraged to throw the thing away and buy a new one. In effect, the machines are making junk.
The handful of people remotely associated with these machines can, of course, tell thier inquisitive children" Daddy makes junk. "Most of the work force, however, is too remote from junk production to sense any contribution to the industry. What do these people do？
Consider the typical twelve - story glass building in the typical American city. Nothing is being made in this building and nothing is being repaired, including the building itself. Constructed as a piece of junk, the building will be discarded when it wears out , and another piece of junk will be set in its place.
Still, the building is filled with people who think of themselves as working. At any given moment during the day perhaps one - third of them will be talking into telephones. Most of these conversations will be about paper for paper is what occupies nearly everyone in this building.
Some jobs in the building require men to fill paper with words. There are persons who type neatly on paper and persons who read paper and jot notes in the margins. Some persons make copies of paper and other persons deliver paper. There are persons who file paper and persons who file paper.
Some persons mail paper. Some persons telephone other persons and ask that paper be sent to them. Others telephone to ascertain the whereabout of paper. Some persons confer about paper. In the grandest offices, men approve of some paper and disapprove of other paper.
The elevators are filled throughout the day with young men carrying paper from floor to floor and with vital men carrying paper to be discussed with other vital men.
What is a child to make of all this？ His father may be so important that he lunches with other men about paper. Suppose he brings his son to work to give the boy some idea of what work is all about. What does the boy see happening？
His father c
A．Y
B．N
C．NG
第10题
A.junk ？
B.junk :error !
C.junk :parameter not set
D.Hi there
