What are the important elements of a personal letter?

A .  All "Add" channels require uniform power levels. B .  The flexibility of wavelengths per OADM is limited. C .  It is easier to balance "Pass-Through" and "Add" channels. D .  There is lower pass-through loss using multi-channel OADMs. E .  You can extract a single channel without dropping other channels.

A . Smothers burning surfaces，organically destroys fuel B . Cools fire and adjacent surfaces，provides protective barrier C . Reaches areas not protected by steam or CO smothering systems D . Allows fire to be attacked from leeward，saturates liquid surface

A .  CDPmust be enabled on all switches in theVTP management domain. B .  All switches in the VTPdomain must run the same version of VTP. C .  When using secure mode VTP， only configure management domain passwords onVTP servers. D .  EnablingVTP pruning on a server willenable the feature for the entire management domain. E .  Use of theVTPmulti-domain feature should be restricted to migration and temporary implementation.

A .  rapid response time B .  head count C .  connectivity D .  security threats E .  reduced complexity F .  disaster recovery

A .  site-to-site VPN for remote offices B .  business-grade firewall C .  Cisco IOS software-based D .  email security E .  XML support F .  premium support via SMARTnet

A .  Smaller companies are at less risk than larger enterprises， so their security needs are not as great. B .  Business strategy should directly relate to the security policy and budget. C .  The designated security expert should report to the IT department， since that is where thesolution will be implemented. D .  Security should be a continuous process. E .  Security solutions should come from multiple vendors to make it easier to coordinate security events from the point of origin.

A . domestics B . settlers C . deeps D . peak

A . 正确 B . 错误

A、Scanning can cut your learning time in half. B、It can also double your reading speed. C、It can help you to research in a purposeful way. D、It can help you become a more flexible reader.

Most Americans stop working at age sixty-five or seventy and retire.【11】work is such an important part of life in this culture, retirement can be very difficult. Retirees often feel that they are useless and【12】Of course, some people are happy to retire; but leaving one's job,【13】it is, is a difficult change,【14】for those who look forward to retiring. Many retirees do not know 15 to use their time or they feel lost without their jobs. Retirement can also bring【16】problems. Many people depend on Social Security checks every month.【17】their working years, employees【18】a certain percentage of their salaries to the government. Each employer【19】gives a certain percentage to the government. When people retire, they receive this money as【20】. (1) A．people B．immigrants C．believers D．followers

A．A good book． B．Avoiding any mistake． C．The puIrpose of reading． D．Reading many books．

Most Americans stop working at the age of sixty-five or seventy and retire. Because work is such an important part of life in American culture, retirement can be very difficult for Americans. Retirees often feel that they are useless and unproductive. Of course, some people are happy to retire, but leaving one's job, whatever it is, is a difficult change, even for those who look forward to retiring. Retirement can also bring financial problems. Many people depend on Social Security checks every month. During their working years, employees contribute a certain percentage of their salaries to the government. Each employer also gives a certain percentage to the government. When people retire, they receive this money as income. Sometimes these checks do not provide enough money to live on, because prices are prone to increasing, a process known as "inflation". Senior citizens, those over sixty-five, typically have to have savings in the bank or other retirement plans to make ends meet. In addition, many senior citizens have to change their lifestyles after retirement. They have to spend carefully to be sure that they can afford to buy food, fuel and other necessities(必需品). Of course, many senior citizens are happy with their retirement. They have time to spend with their families or to enjoy their hobbies. Some continue to work part-time, others do volunteer work. Some, like those in the Retired Business Executives Association, even help young people to start new businesses. Many retired citizens also belong to "Golden Age" groups. These organizations plan trips and social events. There are many other opportunities for retirees. Which of the following could be the best title of the passage？ A．Golden Age Groups B．The American Opinion of Work C．The Importance of Work in America D．The Problems of Retirement in America

正确 错误