用科学记数法表示下列各数. (1)4020.7; (2)576; (3)0.02

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问题:

用科学记数法表示下列各数.

(1)4020.7;

(2)576;

(3)0.027×104

(4)-7089.

考点:科学记数法和有效数字
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支气管哮喘发作持续约1天,出现大汗淋漓、发绀、端坐呼吸,有奇脉。有散在哮鸣音。应采取下列哪项治疗最好()

A.山莨菪碱静脉注射

B.补液加氨茶碱

C.喘乐宁喷雾剂

D.氨茶碱、激素+补液+补充电解质

E.色甘酸二钠喷雾

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《普通砼拌合物性能试验方法标准》GB/T50080-2002标准中配合比分析试验采用的试验方法为()。 

A、色谱法

B、岩相法

C、超声法

D、水洗法

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Low levels of literacy and numeracy have a damaging impact on almost every aspect of adults, according to a survey published yesterday, which offers (1) of a developing underclass. Tests and (2) with hundreds of people born in a week in 1958 graphically illustrated the (3) of educational underachievement. The effects can be seen in unemployment, family (4) , low incomes, depression and social inactivity.

Those who left school at 16 with poor basic skills had been employed for up to four years less than good readers (5) they reached 37. Professor John Bynner, of City University, who carried the research, said that today’s (6) teenagers would even encounter greater problems because the supply of (7) jobs had shrunk.

Almost one fifth of the 1,700 people interviewed for yesterday’s report had poor literacy and almost half (8) with innumeracy, a proportion (9) other surveys for the Basic Skills Agency. Some could not read a child’s book, and most found difficult (10) written instruction.

Poor readers were twice as likely to be a low wage and four times likely to live in a household where partners worked. Women in this (11) were five times as likely to be (12) depressed, (13) both tended to feel they had no control over their lives, and to trust others (14) .

Those who had low literacy and numeracy were seldom (15) in any community organization and less likely than others to (16) in a general election. There had been no (17) in the literary level of (18) reporting problems.

Alan Wells, the agency’s director, said: “ The results emphasize the dangers of developing an underclass people, who were out of work, (19) depressed and often labeled themselves as (20) . There is a circle of marginalization, with the dice against these people and their families.”

20()

A.failures

B.winners

C.successors

D.patients

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对屠宰及肉类加工行业维持类客户,在落实有效担保的前提下,经一级分行批准允许增加授信专项用于国际贸易融资业务及保证金比例在30%及以上的银行承兑汇票业务。()

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哲学家肖伯纳说:“倘若你有一个苹果,我有一个苹果,而我们彼此交换这些苹果,那么,我们依然各有一个苹果。但是倘若你有一种思想,我有一种思想,而我们彼此交换这些思想,那么,我们每个人将有两种思想。”你对此的理解是()。

A.物质交换没有意义,只有思想交换才能拓展视野

B.团结合作不是等价交换,心灵的沟通与理解才是根本目的

C.团结互助前提是能否增加收益,应摈弃等价交换式的互助

D.物质交换是清晰的,而思想交换往往导致思想雷同

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