Finding synonyms and antonyms, using word net-work and using the Internet resources for more ideas can be seen as the ways to ______ .

A . You have too many tables. B . Your tables are too long. C . Your tables have difficult names. D . You want to work on your own tables. E . You want to use another schema's tables. F . You have too many columns in your tables.

A . trichloromethane B . sulfuric chlorohydrin C . chlorine gas D . 4-methyl phenol

A . Synonyms can be created only for a table  B . Synonyms are used to reference only those tables that are owned by another user  C . A public synonym and a private synonym can exist with the same name for the same table  D . The DROP SYNONYM statement removes the synonym, and the table on which the synonym has been created becomes invalid

Professor Taiju Matsuzawa wanted to find out why otherwise healthy farmers in northern Japan appeared to be losing their ability to think and reason at a relatively early age, and how the process of ageing could be slowed down. With a team a colleague (同事) at Tokyo National University, he set about measuring brain volumes of a thousand people of different ages and varying occupations. " Computer technology enabled the researchers to obtain precise (精确的) measurements of the volume of the front and side sections of the brain, which relate to intellect (智能) and emotion, and determine the human character. " The rear section of the brain, which controls functions like eating and breathing, does not contract with age, and one can continue living without intellectual or emotional facilities. Contraction of front and side parts—as cells die off—was observed in some subjects in their thirties, but it was still not evident in some sixty- and seventy-year-olds. Matsuzawa concluded from his tests that there is a simple remedy to the contraction normally associated with age—using the head. The findings show in general terms that contraction of the brain begins sooner in people in the country than in the towns. Those least at risk, says Matsuzawa, are lawyers, followed by university professors and doctors. White collar workers doing routine work in government offices are, however, as likely to have shrinking brains as the farm workers, bus drivers and shop assistants. Matsuzawa's findings show that thinking can prevent the brain from shrinking. Blood must circulate properly in the head to supply the fresh oxygen the brain cells need. "The best way to maintain good blood circulation is through using the brain, " he says, "Think hard and engage in conversation. Don't rely on pocket calculators. The team of doctors wanted to find out______. A．how to make people live longer B．the size of certain people's brains C．which people are most intelligent D．why certain people age sooner than others

A．sizzle B．dazzle C．muzzle D．fizzle

A．Right B．Wrong C．Not mentioned

A．yield B．inherit C．pursue D．benefit

the elasticities approach.  the absorption approach. the Marshall Lerner method. the fixed exchange approach.

◇ Search the Internet for reputable（声誉好的）services. Look for reviews of such sites to learn more about others student’experiences. Don’t join a service until you have done research. ◇ Check to see if you can use a nickname, instead of your real name, to protect your number and birthday. ◇ Stop contact with others if you feel uncomfortable with the topics of the conversation. ◇ Try to use the language you are studying when communicating with others. Asking appropriate questions will also help you learn about other cultures. Remember: To understand a whole culture, you have to talk to many people. 66.Finding friends online may help students______ their language skills and learn more about new cultures. Before you join an Internet service, you have to ______. Giving ______ information to anyone online could be dangerous. To protect your identity online, you’d better not use your ______. Talking to many people is necessary for one to understand a whole ______. 请帮忙给出每个问题的正确答案和分析，谢谢！

A．同义词 B．未受玷污的，无缺点的 C．使有权力 D．动机，激励，刺激 E．偷偷摸摸的，鬼鬼祟祟的 F．残渣，屑粒

A．A.figurative and euphemistic use of words B．B.dialects and regional English C．C.coincidence with idiomatic expressions D．D.the expansion of meaning E．E.Borrowing

是 否

A. Only when B. Once C. Even if D. Much as

A．Capillary refill B．ABG C．Muscle strength D．Daily weight