为“歌手”表增加一个字段“最后得分”的SQL语句是( )。A) ALTERTABL

题型:单项选择题

问题:

为“歌手”表增加一个字段“最后得分”的SQL语句是( )。

A) ALTERTABLE歌手ADD最后得分F(6,2)
B) ALTERDBF歌手ADD最后得分F6,2
C) CHANGE TABLE歌手ADD最后得分F(6,2)
D) CHANGETABLE歌手INSERT最后得分F6,2

考点:计算机等级考试VISUALFOXPRO二级VISUALFOXPRO笔试
题型:单项选择题

美国联邦所得税是累进税,收入越高,纳税率越高。美国有的州还在自己管辖的范围在绝大部分出售商品的价格上附加7%左右的销售税。如果销售税也被视为所得税的一种形式的话,那么,这种税收是违背累进制原则的:收入越低,纳税率越高。 这段话意在说明( )。

A.事实上人们花在购物上的钱基本上是一样的

B.销售税计算方式有悖于政府防止贫富差距扩大的本意

C.联邦所得税与销售税计算方式的不同困扰了美国人的生活

D.从计算方式上来分析,销售税不能被视为联邦所得税的一种

题型:单项选择题

贝母瓜萎散的功用是( )

A.化痰息风,健脾祛湿
B.清肺化痰,散结排脓
C.疏风宣肺,化痰止咳
D.清热化痰,平肝息风
E.润肺清热,理气化痰

题型:单项选择题

防火、灭火、自救等安全知识是每一个中学生应该了解的生活常识.下列火灾事故的处理方法错误的是(  )

A.室内着火不要着急打开门窗

B.电器着火用水扑灭

C.身上衣服着火时可就地滚灭

D.扑灭森林着火时,迅速挖隔离带

题型:单项选择题

Starting with his review of Skinner’s Verbal Behavior, Noam Chomsky had led the psycholinguists who argue that man has developed an innate (天生的) capacity for dealing with the linguistic universals common to all languages. Experience and learning then provide only information about the (1) instances of those universal aspects of language which are needed to communicate with other people within a particular language (2) .

This linguistic approach (3) the view that language is built upon learned associations between words. What is learned is not strings of words per se (本身), but (4) rules that enable a speaker to (5) an infinite variety of novel sentences. (6) single words are learned as concepts: they do not stand in a one-to-one (7) with the particular thing signified, but (8) all members of a general class.

This view of the innate aspect of language learning is at first not readily (9) into existing psychological frameworks and (10) a challenge that has stimulated much thought and new research directions. Chomsky argues that a precondition for language development is the existence of certain principles "intrinsic (原有的) to the mind" that provide invariant structures (11) perceiving, learning and thinking. Language (12) all of these processes; thus its study (13) our theories of knowledge in general.

Basic to this model of language is the notion that a child’s learning of language is a kind of theory (14) . It’s thought to be accomplished (15) explicit instruction, (16) of intelligence level, at an early age when he is not capable of other complex (17) or motor achievements, and with relatively little reliable data to go on. (18) , the child constructs a theory of an ideal language which has broad (19) power. Chomsky argues that all children could not develop the same basic theory (20) it not for the innate existence of properties of mental organization which limit the possible properties of languages.

16()

A.irrespective

B.independent

C.regardless

D.implausible

题型:单项选择题

磁感应强度的单位是()。

A.wb

B.t

C.a/m

D.wb/m

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