We have repeatedly requested payment of $800,（)your overdue account.A、onB、forC、withD、i

t we might effect shipment for the above mentioned order, but after the lapse of 3 months, we have not yet received the covering L/C.

Suppose we have the relation schema R(A,B,C,D)with functional dependencies;F{A→B,B→C,C→D,D→A},then R(A,B,C,D)at least is in

A．1NF

B．2NF

C．3NF

D．BCNF

●Suppose we have the relation schema R(A，B，C，D)with functional dependencies；F{A→B，B→C，C→D，D→A}，then R(A，B，C，

D．at least is in (73) ．

(73) A．1NF

B．2NF

C．3NF

D．BCNF

Suppose we have the relation schema R(A, B, C, D)with functional dependencies; F{A→B,B→C,C→D,D→A}, then R(A,B,C,D. at least is in(73).

A．1NF

B．2NF

C．3NF

D．BCNFThe construct eobegin Statement1; Statement2; coend means Statement1 and Statement2 are to be executed in parallel. The only two atomic actions in this construct are loading the value of a variable and storing into a variable. For the p

A.反复地

B.再三地

C.屡次地

D.方法

issuing, catalog, season, acknowledging, opportunityDear We have received your letter（)r

issuing, catalog, season, acknowledging, opportunity

Dear We have received your letter()receipt of the items we mailed to you and noticing us to cancel shipment of your order for those items which are back ordered. We will be()you a refund as soon as we have completed the necessary paperwork for your account. We would like to take this opportunity to thank you for shopping. Our new()should be arriving at your home shortly, and I believe you will be pleased by some of the beautiful choices our buyers have made this(). Thank you for your patience and understanding and for providing us with the()to be of service to you.

ain, he is driven by some unseen force to do the same thing repeatedly, then a habit is formed. Once a habit is formed, it is difficult, and sometimes impossible, to get rid of. It is therefore very important that we should pay great attention to the formation of habits. Children often form. bad habits, some of which remain with them as long as they live. Older persons also form. bad habits as long as they live, and sometimes become ruined（毁坏） by them. There are other habits which, when formed in early life, are of great help. Many successful men say that much of their success has something to do with certain habits in early life, such as early rising, honesty and so on. Among the habits which children should not form. are laziness, lying, stealing and so on. These are all easily formed habits. Unfortunately older person often form. habits which should have been avoided. We should keep from all these bad habits, and try to form. such habits as will be good for ourselves and others.

1）.（）are formed little by little.

A、Good habits

B、Bad habits

C、Both good habits and bad habits

D、Either good habits or bad habits

2）.Generally speaking, it's difficult for one（） and easy for him（） which should be avoided.

A、to form. bad habits, to form. good habits

B、to form. good habit, to form. bad habits

C、to form. such habits as will be good, to get rid of bad habits

D、to get rid of bad habits, to form. good habits

3）.The last word, "them", in the first paragraph refers to（）.

A、good habits

B、bad habits

C、children

D、older persons

4）.Why should we pay much attention to the formation of habits？（）

A、Because habits are of great help to every one Of us.

B、Because a man can never get rid of a habit.

C、Because we are forced to do them again and again.

D、Because it's hard and even not possible to throw away bad habits.

5）.According to the passage, early rising（）.

A、is such a habit as should have been avoided

B、has something to do with success

C、is an easily formed habit

D、is such a habit as will be kept

o lure new customers and spend so little to keep them after they've been landed. It just doesn't make sense. Taking customers for granted is routine in some larger organizations, where mere bigness generates an attitude of indifference.

Loyal customers are an organization's only protection against bankruptcy, and losing them because of neglect or indifference is downright sinful. Not only do satisfied customers continue to fatten the till, they often encourage others to buy. This is advertising that doesn't cost a penny. And although there are always problems in giving good service to customers, maintaining their patronage(光顾) isn't all that difficult. It's a matter of attitude, of believing that everyone who buys from you is entitled to the best treatment you can deliver. Plus giving just a little more than you have to.

We said there are always problems in giving good service to customers. The reason, of course, is that no organization is perfect, and there's many a slip: unreasonable delays in filling orders, shipping the wrong merchandise, failing to answer letters promptly, and so on.

Sometimes these errors or failures can't be helped. For example, if you can't get parts because of material shortages or a transportation strike, customers may be denied the goods they've ordered. And not infrequently the customer is to blame—for example, failing to clearly identify the article or service required.

Yet no matter who is at fault, customers whom you value highly should generally be given the benefit of the doubt. Note that we said "customers whom you value highly." The old saying(格言) goes that all customers should be treated alike is a myth. Customers who repeatedly place large orders and pay for them will naturally, get more attention than those who buy infrequently and have to be badgered to pay what they owe. However, you have to make the assumption that all customers are good unless proved otherwise.

The main idea of the passage is best expressed by which of the following？ _____

A．Business organizations should not spend so much money to attract new customers

B．Maintaining customers' patronage is the most important to business organizations'

C．Customers are kings

D．Organizations should pay more attention to the benefit of their customers

Which one is true about identifying the first step according to the article？

A.We can make the cost of effort feel even smaller if we link that small step to something we’re actually looking forward to doing.

B.Tie the task that we’re avoiding to something that we’re not avoiding.

C.Sometimes we find ourselves returning to a task repeatedly, still unwilling to take the first step.

D.Achieve that small goal, and you’ll feel more motivated to take the next small step than if you’d continued to beat yourself up about your lack of language skills.