下列说法正确的是( )。A．国际经常项目出现大量逆差，说明该国出口的能力上升 B．

阅读理解。裉据短文内容判断正(T) 误(F) 。

     These two letters appeared in a newspaper. Both writers have their own ideas on zoos.

                                                                 Zoos Do a Good Job

    It is good to keep animals in zoos. I know a lot of people think it is wrong to keep animals in zoos.

 However, I believe that zoos have many good points.

    Firstly, zoos are places for people to see different animals from all over the world. Without the zoos,

 most people would never see a real bear or tiger.

       Secondly, zoos look after the animals very well. The animals are always given food and cleaned

 regularly (定期的). In the wild, it is not always possible for an animal to find food, so sometimes it goes

  hungry. But animals kept in zoos never go hungry.

     Thirdly, zoos protect the animals they look after. They offer them safe places to live in. In the wild,

 some kinds of animals are in danger of becoming extinct (灭绝的). But zoos give these animals a chance

 to live. Without zoos. There would be fewer kinds of animals in the world.

                                                                                                                          Maria Smith

                                                                      Zoos are Unnatural

     In Maria's letter, she says that zoos are good for animals. I am afraid that zoos are not good for

 animals, they are only good for people.

      It is unnatural and unfair to keep wild animals in cages. Most animals are kept in cages that are too

 small for them. In the wild, these animals would travel freely In zoos. They can't do this. This is why the

 bears and tigers always look so sad.

        Most cages are not very clean, either. It is true that zoos give the animals food regularly, but this is

 not natural. Wild animals are used to looking for their own food. We should treat animals in the same

 way that we treat other people with respect.

       Would anyone be happy if you don't let them go outside his home? Would Maria like to have lots of

 people stand out side her flat looking at her? No, she wouldn't. And animals don't like it, either.

                                                                                                                                Philip Black

1. Maria and Philip have quite different ideas on keeping animals in zoos.

2. In Maria's opinion, a real bear or tiger can only be seen in zoos.

3. Maria thinks that animals live better in zoos than in the wild.

4. According to Philip, if cages are big and clean enough, tigers and bears will look happy.

5. Maria and Philip both agree that zoos are good for people.

在全球化趋势下，国际社会越来越成为一个不可分割的整体。一国安全问题解决的好可以惠及别国，反之，则会殃及他国，国家安全在一定程度上显现出“一荣俱荣，一损俱损” 、的特点。下列选项中与上述特点无关的哲学道理是( )。

A．事物之间相互影响，相互制约

B．内因是事物变化发展的根据

C．外因是事物变化发展的条件

D．事物处于因果联系的链条之中

简述服务定价的特点与定价的方法。

什么是网络经济？它有哪些特征？