问题 问答题

请阅读下列短文,然后回答问题.

自然界中的许多现象都和水的物态变化有关.当温暖潮湿的地面空气上升,达到一定的高度时,由于那里的温度很低,空气中的水蒸气凝结成了小水滴,就形成了美丽多姿的云朵.

有时候,在湛蓝的天空中也会出现一条长长的白色云带,这是高空飞过的喷气式飞机“描绘”出来的.由于飞机喷出大量的烟粒,这些烟粒起着凝结核的作用,使水蒸气凝结后附着在烟粒上,形成云带,在阳光的照射下,云带呈现出白色.

问题:

(1)在形成云带的过程中主要的物态变化是什么?

(2)炎热的夏天,剥开冰棍儿的包装纸,会看到冰棍儿周围出现了“白气”,其中的原因是什么?

(3)在某些烟尘污染严重的地区,雾天比其他地区要多,其中的原因是什么?

答案

(1)由题中“由于飞机喷出大量的烟粒,这些烟粒起着凝结核的作用,使水蒸气凝结后附着在烟粒上,形成云带”可见:云带的形成过程主要是液化,与雾的形成过程相同;

(2)炎热的夏天气温较高,冰棍儿周围空气温度低,空气中的水蒸气遇到温度较低的冰棍儿液化成小水滴悬浮在空中形成“白气”;

(3)在污染严重的地区空气中存在大量烟尘,成为水蒸气液化的凝结核,从而使水蒸气更容易液化成小水滴附着在上面形成雾.

阅读理解

阅读理解: 阅读下列短文,从每题所给的A、B、C和D项中,选出最佳选项。

The traditional tent cities at festivals such as Glastonbury may never be the same again. In a victory of green business that is certain to appeal to environmentally-aware music-lovers, a design student is to receive financial support to produce eco-friendly tents made of cardboard that can be recycled after the bands and the crowds have gone home.

Major festivals such as Glastonbury throw away some 10,000 abandoned tents at the end of events each year. For his final year project at the University of the West of England, James Dunlop came up with a material that can be recycled. And to cope with the British summer, the cardboard has been made waterproof.

Taking inspiration from a Japanese architect, who has used cardboard to make big buildings including churches, Mr. Dunlop used cardboard material for his tents, which he called Myhabs.

The design won an award at the annual New Designers Exhibition after Mr. Dunlop graduated from his product design degree and he decided to try to turn it into a business

To raise money for the idea, he toured the city’s private companies which fund new business and found a supporter in the finance group Mint. He introduced his idea to four of Mint’s directors and won their support. Mint has committed around £500,000 to MyHabs and taken a share of 30 per cent in Mr. Dunlop’s business. The first Myhabs should be tested at festivals this summer, before being marketed fully next year.

Mr. Dunlop said that the design, which accommodates two people, could have other uses, such as for disaster relief and housing for the London Olympics.

For music events, the cardboard houses will be ordered online and put up at the sites by the Myhabs team before the festival-goers arrive and removed by the company afterwards. They can be personalized and the company will offer reductions on the expense if people agree to sell exterior (外部的) advertising space. 

The biggest festivals attract tens of thousands of participants, with Glastonbury having some 150,000 each year. Altogether there are around 100 annual music festivals where people camp in the UK. The events are becoming increasingly environmentally conscious.

1. “Eco-friendly tents” in paragraph 1 refer to tents _______.

A. economically desirable    B. favorable to the environment

C. for holding music performances1   D. designed for disaster relief

2. Mr. Dunlop established his business        .

A. independently with an interest-free loan from Mint

B. with the approval of the City’s administration

C. in partnership with a finance group

D. with the help of a Japanese architect

3. It is implied in the passage that _______.

A. the weather in the UK is changeable in summer 

B. most performances at British festivals are given in the open air

C. the cardboard tents produced by Mr. Dunlop can be user-tailored

D. cardboard tents can be easily put up and removed by users.

4. The passage is mainly concerned with        .

A. an attempt at developing recyclable tents

B. some efforts at making full use of cardboards

C. an unusual success of a graduation project

D. the effects of using cardboard tents on music festivals

5. Which of the following would be the best title for the text?

A. Don’t Use Tents Again

B. The Advantages of Tents

C. How to Produce Tents

D. The Development of Recyclable Tents

选择题