题目内容
【题目】A green roof is a roof of a building that is covered with vegetation over a waterproof membrane (防水膜). It is a proper method of growing plants on the roof and does not refer to the mere green color of the roof. People benefit a lot from these green roofing systems, and they are gaining popularity day by day.
Human beings have occupied major areas of land and transformed them into huge buildings, which has severely affected the environment and the natural habitat of bird and insects. Green roofing compensates for that. It creates a natural habitat for creatures like bees, grasshoppers and other insects.
Modern roofs need a lot of energy to control the temperatures in winter and summer. However, green roofs reduce the amount of energy required for controlling temperatures, thus making them energy-efficient. As green roofing is highly energy-efficient, it can act as a encouragement for people who are interested in green roofing systems and their benefits. It will increase the market value of the building and fetch the owner a great share of profit.
As the vegetation requires a water supply, there is a inbuilt water preservation layer in the green roof system. This layer helps to keep the rainwater. It makes full use of the rainwater and prevents wastage. During heavy rains, the water runs off the flat roof. The green roof prevents this overflow by slowing down the volume of running water.
Green roofs can compensate for the lost greenery in urban areas and increase the artistic value of an area. Your building will look beautiful, coated with green vegetation. Green roofs can serve as local community garden and create a natural atmosphere, giving physical and psychological benefits like reducing stress levels in people and keeping them physically fit. Besides, people can start their own small-scale cultivation (栽培)and experience the pleasure
of gardening.
【1】What do we know about a green roof?
A. It is painted green for a specific purpose
B. It uses solar energy to produce electricity
C. it is designed for kids to enjoy themselves
D. it is covered with grass, flowers or other plants
【2】Mr. Black who owns two buildings is interested in the green roofing system probably because_____.
A. it can solve the problem of air pollution
B. it produces more energy to power the buildings
C. it creates natural habitats for birds and insects
D. it can save him spending a lot of money on energy
【3】How do the plants on green roofs get watered?
A .Rainwater is often kept in the green roof system for later use
B. They mainly make use of the wasted water in people’s lives
C .The plants on green roofs usually need little water
D .People have to water the plants from time to time
【4】According to the last paragraph, a green roof is a place _____.
A. where people can get close to nature
B. where people can relax and enjoy gardening
C. where people can hold all kinds of activities
D. where people can stay away from the city life
【答案】
【1】D
【2】D
【3】A
【4】B
【解析】
试题分析：文中写了一种绿色屋顶的建筑，屋顶覆盖上一些植被是一种适当的方法并不是指单纯的绿颜色的屋顶，这是一种有益于人们的建筑。
【1】D推理判断题。由短文整体可知，绿色屋顶不仅仅是一种涂着颜色的屋顶，而是一种园艺，所以是覆盖着花花草草的屋顶，故选D。
【2】D推理判断题。由文中的It will increase the market value of the building and fetch the owner a great share of profit.可知他将会增加市场价值，会给房子所有者更多利益。可知Mr.black有两套房子，可以出租，运用绿色屋顶就可以增加他的收益，故选D。
【3】A细节理解题。由文中During heavy rains, the water runs off the flat roof. The green roof prevents this overflow by slowing down the volume of running water.可知绿色屋顶系统主要是由降雨供水，所以A符合题意，故选A。
【4】B细节理解题。由文中Besides, people can start their own small-scale cultivation and experience the pleasure of gardening.可知人们可以自己种植为了娱乐，所以B符合题意故选B。
