问题 选择题

外界的空气寒冷、干燥,并混有灰尘和细菌,通过鼻腔后变得温暖、湿润、清洁.鼻腔中与之相适应的结构是(  )

①鼻毛    ②鼻腔黏膜    ③鼻腔黏膜中的嗅细胞    ④鼻腔黏膜中的毛细血管.

A.①②③

B.①②④

C.②③④

D.①③④

答案

鼻腔是呼吸道的器官之一,与呼吸功能相适应,其内部有鼻毛,可阻挡灰尘;内表面的鼻黏膜上的腺细胞能够分泌黏液,粘住和阻挡灰尘和湿润空气,黏膜中还分布有丰富的毛细血管,起到温暖空气的作用.这些都能够减少了对肺的刺激.可见B符合题意.

故选:B

阅读理解

阅读理解。

      a) Many people like animals and take them as their pets, so pet hospitals are usually very busy. Kind

persons who love animals are needed to help in busy animal hospitals. Those vets (兽医) will teach them

how to take care of the animals.

     b) Scientists think that pets will probably be much smaller because people in the future will live in much

smaller space. Scientists are now working on making very small farm animals. The same thing might be done

to make small cats and dogs.

    c) It's said that some day you might own a panther (豹) as a pet. Some scientists believe that they might

have to start turning wild animals into pets, since this might be the only way to save them from dying out.

    d) What about a robot for a pet? This may sound silly, buy it could become true. Robot dogs have been

made to sell. They are like real dogs. These pets might become more and more popular in the future.

    e) Lots of people miss their pets while they are on holiday. One hotel in Minnesota has solved this problem.

They lend cats to their guests. Many experts (专家) believe this idea will become more and more popular. It is

very possible that in the future you will be able to order a pet, as well as room service, at a hotel.

1. Why do the scientists want to make the farm animals smaller?

A. Because people in the future may own smaller living space.

B. Because robots will become pets.

C. Because they like smaller animals.

D. Because animals are dying out.

2. In order to protect the animal from dying out in the future, people will probably keep _________ as a pet.

A. a cat

B. a dog

C. a robot

D. a panther

3.What's the "d" paragraph (段落) about?

A. Smaller pets.

B. A robot for a pet.

C. A panther for a pet.

D. Farm animals for pets.

4. According to the "e" paragraph, when do many people miss their pets?

A. While they are at home.

B. While they are on the farm.

C. While they are on holiday.

D. While they are in hospital.

5. According to the reading material, which of the following is TRUE?

A. The persons who keep animals have to help in busy animal hospitals.

B. Because there are more and more animals, pet hospitals are usually very busy.

C. In the future wild animals will probably become pets.

D. The pets have become smaller and smaller.

填空题