下列哪一项货物或物品不适用暂时进出境通关制度：A．进口待转口输出的转口贸易货物 B．

已知f（x）是R上的偶函数，且f（1）=0，g（x）是R上的奇函数，且对于x∈R，都有g（x）=f（x-1），则f（2009）的值是（　　）

A．0

B．1

C．-1

D．2

X线对三维空间的被照体进行照射，形成载有被照体信息成分的强度不均匀分布。此阶段信息形成的质与量，取决于被照体因素（原子序数、密度、厚度）和射线因素（线质、线量、散射线）等。将不均匀的X线强度分布，通过增感屏转换为二维的荧光强度分布，再传递给胶片形成银颗粒的分布（潜影形成）；经显影加工处理成为二维光学密度的分布。此阶段的信息传递转换功能取决于荧光体特性、胶片特性及显影加工条件。此阶段是把不可见的X线信息影像转换成可见密度影像的中心环节。

被照体因素（原子序数、密度、厚度）所形成的对比度称为（）

A.胶片对比度

B.X线对比度

C.物体对比度

D.光学对比度

E.人工对比度

下面( )不是能增强企业的风险管理能力的好处。

A．成本节约
B．对融资成本的影响
C．裁员
D．改进产品和服务的周期

阅读理解。

     "Choo, Choo!" Here comes the Chunnel train. Get aboard if you want to learn more about this underground

transportation system. This is an unusual form of transportation, because it is a tunnel that trains travel through

and not an actual form of transportation.

     The Chunnel is actually the English nickname for the Channel Tunnel. In French, it is called le tunnel sous

la Manche. It is a rail tunnel beneath the English Channel at the Straits of Dover. It connects Cheriton in Kent,

England with Sangatte in northern France. It is the second longest rail tunnel in the world.

     Did you know that the British and the French had a race while they were building the Chunnel? The race

was to see who could get to the middle of the tunnel first. The British won by a little bit. It took 15 000 workers

over seven years to dig the tunnel. The tunnel was finished in 1994.

     The completed Chunnel cost about $ 21 billion. But it all paid off, because it became very popular, very

quick. Millions of people use it. Now it is getting even more popular.

     There are three complete tunnels in the Chunnel. The two outside ones are the passenger trains. The small

inner one is a guidance train. The guidance train is not used for transportation. Each track is exactly parallel to

each other.

     There are four different train systems in the Chunnel. The Eurostar is a high speed passenger service that

connects London, Paris, Brussels, and Lille. The Eurotunnel shuttle is a rail ferry service. These shuttles carry

cars and vans. These are railcars that allow drivers to drive their vehicles on and off. There are also two

Eurotunnel goods service trains.

     Now you know more about the Chunnel. Everybody off, this is the last stop.

1. The Channel Tunnel links ______ with ______.

A. London; Paris

B. Cheriton; Sangatte

C. Lille; Brussels

D. Dover; Kent

2. Which of the following shows the structure of the tunnels in the Chunnel?

A.  B.  C.  D.

3. The Eurotunnel shuttle is intended to carry _____.

A. passengers

B. drivers and their vehicles

C. goods

D. staff members of the Chunnel

4. The text can most probably be _____.

A. found in a guidebook

B. read in a magazine

C. broadcast on a train

D. heard in a railway station

新生儿期感染的支原体主要是（）

A.肺炎支原体

B.人型支原体

C.解脲支原体

D.口腔支原体

E.生殖支原体