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从WWW的资源和行为中抽取感兴趣的、有用的模式或隐含的信息的过程，称为（）挖掘。

答案

参考答案：WEB

解析：

Web挖掘一般地可以定义为：从WWW的资源和行为中抽取感兴趣的、有用的模式和隐含的信息。

选择题

下列各句中，没有语病的一项是[ ]

A．人们普遍担心，忽视对青年大学生的心理健康教育是导致北大一研究生跳楼自杀的主要原因。

B．据《中国日报》报道，我国居民43%的储蓄用于子女的教育，这个比例已超过了用于养老或购买住房的储蓄比例。

C．我们一中的学生应该有开阔的心胸，就是和自己生活观点不同的同学也应该坦诚相待。

D．改革公费医疗制度、实施医疗保险的问题，对于广大人民群众并不是一下子就能愉快接受的，这需要政府部门做好宣传解释工作。

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Most taxpayers have had enough income tax collected by their employers during the year. So they do not (36) any money. In fact, most Americans get some money back. Last year, the Internal Revenue Service returned at least some money to more than (37) Americans paying individual income tax.
The United States has what is called (38) . Tax rates increase as (39) increase. This year, people earning more than (40) are taxed at the highest rate.
Earnings above that amount are taxed at (41) . Earnings below that amount are taxed at lower rates.
Individuals who earn less than (42) pay no income tax. But they do pay (43) , Medicare and other taxes.
There are many different ways for people and businesses to reduce their (44) Most homeowners, for example, can reduce their taxes a little by reporting to the I.R.S. the interest they pay (45) . This is called a (46)
In 2004, personal income taxes provided the government with most of its money: (47) of the budget. Social security and other (48) taxes provided (49) . Other forms of income include (50) , money borrowed to (51) and special taxes on (52) .
But income from taxes did not provide enough to pay for government spending. The I.R.S. says the budget deficit for 2004 was about (53) dollars.
Preparing tax documents can be complex. The I.R.S. estimates that taxpayers need an average of about 13 hours to prepare tax documents. And that is just for the basic tax form. For business, the I.R.S. estimates an (54) needs more than 50 hours. This is why a lot of Americans pay (55) to complete their tax documents for them.
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