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问题 单项选择题

下列说法错误的是（）

A.当摄入量达到RDA水平时，几乎所有个体都没有发生缺乏症的危险

B.当摄入量达到RDA水平以后，继续增加摄入量更加有益于人体健康

C.当摄入量水平介于RDA和UL之间时，对人体是安全的

D.摄入量超过UL水平时，如再继续增加，则对人体的安全性降低

E.人体每天都需要从膳食中获得一定量的各种必需营养成分，如果人体长期摄入某种营养素不足就有发生该营养素缺乏的危险

答案

参考答案：B

解析：当摄入量达到RDA水平时，几乎所有个体都没有发生缺乏症的危险；当摄入量达到RDA水平以后，继续增加摄入量不会带来更多的好处，但若不超过UL水平也不会对健康造成危害；摄入量超过UL水平时如再继续增加，则产生毒副作用的可能性也随之增加。

选择题
找一找，选一选。
( ) 1. underA.
( ) 2. markerB.                                                                     
( ) 3. penC.
( ) 4. pencilD.
( ) 5. bodyE.
( ) 6. footF.
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单项选择题 案例分析题

What is logistics? In the current business environment,logistics is generally accepted as a very important element for the economic development and business growth of a region,especially a port city. In reality,what does logistics mean?In which way does it operate? For simple definition,logistics is a set of procedures in which commodity is delivered in an efficient manner from suppliers to customers.There are three key aspects to the concepts: 1．Movement of goods Goods can be considered as valuable objects,such as cargo and materials that are valua-ble and purchasable through commercial transactions and processes.Flow can be determined as methods in which goods are moved or transferred between locations,intermediaries and merchandisers.Modes of transportation include motor,rail,water,air and pipeline. 2.Direction of the flow of goods In the open market place,buyers and sellers represent two ends of a commercialtrans-action.Buyers are usually customers who demand the goods,while,as sellers are suppliers who provide such goods.When a transaction is agreed upon (sometimes payment is comple-ted,other times the payment is arranged to be completed at a later stage),the suppliers have the responsibility to arrange for the goods to be delivered to the customers. 3.Efficient management of the flow process The transportation of goods should bear low cost and ensure safety and punctuality.It should do its best to avoid wasting customers＇resources.Currently,the flow of goods is generally controlled by both hardware and software.By hardware,we mean logistics facili-ties and equipment,such as ports,warehouses and trucks,ships,railroad,cars and air-lines.By software,we mean information system,standardization and data sharing.Questions:

When a transaction is agreed upon，does every payment need to be completed？（）

A.Yes,completely.

B.Not neccessary.

C.Depen

D.Completed based on whatever suppliers need．
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