You are building a Front Controller using a JSP page and you need to determine if the user’s session hasNOT been created yet and perform some special processing for this case. Which scriptlet code snippet willperform this test？（）

A . 30 networks and 6 hosts. B . 6 networks and 30 hosts. C . 8 networks and 32 hosts. D . 32 networks and 18 hosts. E . 14 networks and 14 hosts. F . None of the above

A . 20 km [12.4 miles] B . 10 km [6.2 miles] C . 5 km [3.1 miles] D . 25 km [15.5 miles] E . 15 km [9.3 miles]

A、The requirement for the oil content of bilge water discharged is 15 ppm. B、No discharge in sensitive waters. C、Any discharge in sensitive waters. D、International, national or local requirements have to be observed.

A . ChannelFactory B .

A . Class 1 B . Class 2 C . Class 3 D . Class 4

A . 20 km [12.4 miles] B . 10 km [6.2 miles] C . 5 km [3.1 miles] D . 25 km [15.5 miles] E . 15 km [9.3 miles]

A . meeting B . meets C . met D . to meet

A . Expect to see cirrus clouds followed by altostratus and nimbostratus clouds B . Alter course to remain in the navigable semicircle C . Prepare for gusty winds，thunderstorms，and a sudden wind shift D . Expect clear weather，with steady winds and pressure，until the front passe

A.hundreds of B.two thousands C.decade of

You are creating a Windows Communication Foundation (WCF) service. The service endpoints change frequently. On the service, you add a new ServiceDiscoveryBehavior to the Behaviors collection of the ServiceHost Description property. You need to ensure that client applications can communicate with the service and discover changes to the service endpoints.What should you do？（） A. Add a new ServiceDiscoveryBehavior to the Behaviors collection in the client application. B. Add a new AnnouncementClient to the Behaviors collection in the client application. C. Use the FindCriteria class and the UdpDiscoveryEndpoint class to set up the binding in the client application. D. Use the DiscoveryProxy class and the EndpointDiscoveryMetadata class to set up the binding in the client application.

Only a few decades ago, renovation was unpopular and generally far more expensive than taking down abandoned building and string from the beginning.A change began in the 1960s with a number of well-advertised projects.They included Ghirardelli Square in San Francisco, where an old chocolate factory was restored and made into shops and restaurants, Trolly Square in Salt Lake, where unused warehouses were made into artists’ studios and apartments. What caused the change？ “One reason is nostalgia,” a San Francisco builder suggests.“Maybe old is better than new, many people are saying.Feelings about preserving attractive or historic buildings have changed a great deal.” A second cause is economy.The cost of tearing down an old building and constructing a new one from nothing now has risen to the point where it is often less expensive to fix a solid older structure.Also builders realize that fixing up an existing building often requires no new permits, sewer lines, or water connections. Even when the costs of restoration are the same as or a bit more than the costs of putting up a new building, fixing the old building may be better.A Boston architect says The advantage comes when you can develop a final project that is more desirable than a new building – one with the right location, more space, more floor area, a special character, materials of a particular quality.” Gradually, architects and builders are developing knowledge about renovation and preservation, bringing imagination and creativity to the job. 16.In the United States, renovating old buildings_____. A.has had a long history B.is becoming increasingly popular C.is still unpopular D.has just caught the fancy of architects and builders 17.Ghirardelli Square, Trolley Square, and the Soho district are projects that_________. A.have been given much publicity B.are little known to the public C.have been widely discussed among builders and city planners D.have changed the building business 18.“Nostalgia” in the 3rd paragraph most probably means________. A.being conservative B.being keen on saving money C.being fond of things new D.being fond of things of the remote past 19.Which of the following statements is true？ A.Every old building can be renovated for new uses B.Renovating old buildings is always less costly than putting up new ones C.Renovation does not require imagination and creativity D.Fixing an old building may have advantages even when it costs a little more

Log cabins were first built in the late 1600s along the Delaware river valley. The European immigrants who settled there brought centuries' old traditions of working with logs. And in this heavily wooded area logs were the material in hand. Log cabins were the most popular in the early 1800s with the settlers who were moving west. They provided the answer to the pioneer's need for a sale and sliding boards for windows. But the log buildings that have probably had most influence on modern architects are those of the mountain retreats of wealthy New Yorkers. These country houses which were popular in the early 1900s typify what's known as the Adoroundyx style. Now let's look at those slides. What is the speaker mainly discussing？ A．Traditional European architecture. B．Techniques for building log cabins. C．The history of log structures. D．How to build a home by yourself.

When you go to look at apartments to rent, there are several things you ought to do. First, you should find out if the apartment is safe. Be sure there are good locks on all the windows and doors. It is also a good idea to check all the appliances as well as the water and electricity to be sure everything is working. It might also be a good idea to talk to other people who rent apartments in the same building. This will help you to find out if there are any problems. If you decide to rent an apartment, the landlord would probably want you to sign a lease. This is a legal contract and you ought to read it carefully. You will also need to pay a security deposit. If there is no damage the landlord has to return this money when you leave. Whom can you ask for help to look for a place to live？ A．Your friends. B．Your teachers. C．Other people you meet. D．All of the above.

Some condo hotels can now be found in beach and mountain towns and a few small cities,However, none is more famous than the great 105-year-old Plaza Hotel in New York,on Fifth Avenue across from Central Park. The Plaza closed for repair in When it reopened two years later,more than half of it had been changed into one of these modern condo hotels. Here&39;s how it works: You buy what equals to an apartment(公寓). If it&39;s at&39;The Plaza,it will cost you between $ 1.5million and $9 mllion. So you own a part of the building. But there&39;s some inconvinience. You may stay there no more than 120 days a year. hereion. The rest of the time,the hotel&39;s workers can book guests into your place, just as they would in the regular hotel&39;s rooms. So if you&39;re lucky and rich,you can now live in really special quarters up to almost one thid of the year. While others pay off your mortgage(房贷)the rest of the year. So far,a great monry of the nation&39;s condo hotel units have been purchased not by rich people but richer companiesm, including foreign ones. They want a nice place for their bosses to stay when they are in town or working late at the office. 47.A condo is a place where people . A.live B.work C.eat D.study What do we know about a condo hotel？A.It is designed by rich companies. B.It is built for foreign travellers. C.It is usually sold at a low price. D.It is owned by different people. How long can you stay in your own condo hotel unit a most each year？A.120 days B.One month C.Half a year D.Three months. What does purchased in the last parngraph probably mean？A.Closed. B.Bought. C.Damaged. D.Repaired. 请帮忙给出每个问题的正确答案和分析，谢谢！

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