世界艾滋病日是每年的何月何日?

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问题:

世界艾滋病日是每年的何月何日?

考点:乡村医生预防医学预防医学题库
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根据短文内容,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 many different kinds of animals from all over the world. Without

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.

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 offer them safety in danger of becoming extinct (灭绝). 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,

and they are only good for people.

      It is unnatural (非自然的)and unfair to keep wild animals in cages. Most animals are kept in cages. They

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 him go out of his home? Would Maria like to have lots of people

standing outside her flat looking at her? No, she wouldn't. And animals don't like it either.

                                                                                                                                 Philip White

( )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.                              

( )6. In the two letters, they are discussing how to make animals in zoos happy.              

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总骨脚的构成为()

A.上半规管后脚和水平半规管后脚

B.上半规管后脚和后半规管下脚

C.上半规管后脚和后半规管上脚

D.水平半规管后脚和后半规管上脚

E.后半规管上脚和水平半规管前脚

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下列说法正确的是( )

A.物体吸热时,温度一定升高,内能一定增加

B.物体温度升高,不一定吸收热量,但内能一定增加

C.物体放热时,温度一定降低,内能一定减少

D.物体温度降低,一定放出热量,但内能不一定减少

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发动机润滑系具有四大作用,其中()作用主要是靠润滑油在做相对运动的零件表面形成油膜来实现的。

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屏蔽室在使用频率范围内,屏蔽衰耗不小于()。

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