在常用的涵洞洞扣建筑形式中,泄水能力较强的是(  )。A.端墙式 B.八字式 C.并

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问题:

在常用的涵洞洞扣建筑形式中,泄水能力较强的是(  )。

A.端墙式

B.八字式

C.并口式

D.正洞口式

考点:造价工程师建设工程技术与计量(土建)造价工程师建设工程技术与计量(土建)2008年
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婴儿每日每公斤体重需水

A.100ml

B.125m1

C.110ml

D.150ml

E.140ml

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(2009)在如下关系信号和信息的说法中,正确的是:()

A.信息含于信号之中

B.信号含于信息之中

C.信息是一种特殊的信号

D.同一信息只能承载在一种信号之中

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Nine states and the District of Columbia are doing away with the sales tax on items such as clothes, shoes and even notebooks over the next few weeks, just in time for back-to- school shopping.
Most of the promotions last only a few days, so shoppers will have to act quickly to get a tax break. The tax holidays, which have already expired in two other states, apply to small and large items. For example, the tax break applies to any school supply that costs $15 or less in New Mexico. In Massachusetts, it covers most retail purchases of $2,500 or less. Stores may offer additional savings because these events "give retailers an opportunity to have a sale on top of what the state is doing," says Verenda Smith, government affairs associate at the Federation of Tax Administrators.
No industry-wide figures are available about how much consumers save annually from these tax breaks. But Texas estimates that shoppers will save $47.4 million in taxes this year, nearly a 3 percent increase from the previous year. Massachusetts says shoppers saved roughly $10 million in taxes during its 2005 event.
States that cast aside these promotions when a slow economy pinched state budgets are now reviving them in hopes of stimulating local economies. Some states also believe the gain in consumer goodwill helps balance out the loss in tax revenue.
In some cases, tax losses are minimal because serious shoppers don’t stop at clothes and books. "While states give up sales tax, they usually break even on sales-tax collection," says J. Craig Shearman, a vice-president at the National Retail Federation.
Sophie Beckmann, a certified public accountant at A. G. Edwards in St. Louis, says she’ll avoid that temptation by making a list of necessities. On the Missouri resident’s shopping list: notebooks, pencils, glue and three or four outfits for her son, who is entering the fifth grade this month. She plans to pocket any tax savings. "When you start buying more and spending more just because of the savings, then you’re not doing yourself a favor," Beckmann says.

All the following terms that appear in Paragraph 2 refer roughly to the same as "tax-free shopping" EXCEPT ______ .

A.shoppers

B.tax breaks

C.tax holidays

D.promotions

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世界贸易组织的主要职能是()

A.实施和管理协议;

B.提供双边贸易谈判场所;

C.解决成员方之间的贸易争端;

D.审议各成员的贸易政策;

E.与有关机构的合作。

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多品种产品边际贡献率受()的影响。

A.V

B.P

C.Q

D.F

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