对于同一个投资组合来说,只要期收益存在波动,则算术平均收益率都将高于几何平均收益率。

题型:判断题

问题:

对于同一个投资组合来说,只要期收益存在波动,则算术平均收益率都将高于几何平均收益率。( )

考点:证券业从业考试证券投资基金证券业从业资格
题型:判断题

能源与环境已成为人们关注的热点。

(1)煤、石油、                        属于化石燃料。要节约现有能源,还要开发新能源,如:地热能、核能、                     (填一种即可)等。

(2)科学家预言,氢能源将成为21世纪的主要绿色能源,而水是自然界中广泛存在的物质,依据下图请你写出获取氢气的化学方程式                                   

(3)含硫煤燃烧排放的SO2会引起“酸雨”现象。为减少大气污染,某发电厂采用了“石灰固硫法”,即向煤中掺入生石灰(CaO),在氧气参与反应和高温的条件下,用来吸收SO2,只生成硫酸钙,写出该反应的化学方程式                                      。

(4)“绿色化学”的特点之一是“零排放”。一定条件下,一氧化碳和氢气可以按照不同比例反应,若只生成一种产物就能实现“零排放”,符合这一要求的产物是               (填字母序号)。

A.甲醇(CH4O) B.甲醛(CH2O) C.乙醇(C2H6O) D.乙醛(C2H4O)

题型:判断题

李燕、刘晓、张敏、蔡华是住在同一个宿舍。以下是她们四人的对话: 李燕:我们这栋楼住的都是来自城市的学生 刘晓;那不一定吧 张敏:我们这栋楼住的有的是从农村来的 蔡华:刘晓不是来自城市的 如果这四人中有三个人说的都是真话,那么以下结论中肯定为真的一项是( )

A.说假话的是李燕,刘晓不是来自城市的学生

B.说假话的是刘晓,张敏不是来自城市的学生

C.说假话的是蔡华,刘晓不是来自城市的学生

D.说假话的是李燕,张敏不是来自城市的学生

题型:判断题



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.

题型:判断题

英国谈判专家比尔·斯科特认为:中型谈判各方直接参与谈判的人数在()

A.4--12人之间

B.6—12人之间

C.6—10人之间

D.4—8人之间

题型:判断题

有一半径为4m的半球形水池里有2m深的水,现需将水全部抽到距地面6m高的水箱内.

求抽水至少需要做多少功。

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