单元限时训练(一) SCIENCE FICTION（Word练习）-【优化指导】2021-2022学年新教材高中英语选择性必修第四册(人教版2019)

单元限时训练(一) (限时40分钟) Ⅰ.阅读理解 A Indian scientists have designed a new device they hope will solve one of the biggest problems with the use of solar energy. They call the device a solar tree. Solar trees have metal “branches” extending from a tall, central pole at different levels. Each branch holds a photovoltaic (光电的)panel, also called a solar panel. These panels are flat surfaces that collect energy from the sun and turn it into electricity. Daljit Singh Bedi is the chief scientist at the Council of Scientific and Industrial Research, or CSIR, in New Delhi，India. The CSIR laboratories are where the solar tree was designed. Bedi says the shape of the solar tree makes it possible to fit more photovoltaic panels in a space than traditional systems do.“It takes about 4 square meters of space to produce energy which otherwise would have required 400 square meters of space，” he says. Scientists believe the energy a solar tree collects will be enough to power five homes. The solar trees will make it easier to provide solar energy for homes in cities, they say. The solar trees will also take less space from farmers in rural areas. And they will collect more energy than normal photovoltaic panels on the tops of buildings, because their design helps with placement of solar panels in a way that they are exposed more to the sun. India is the world's third largest producer of greenhouse gases. The country has promised to reduce its rate of greenhouse gas production. The cost of photovoltaic panels has gone down in recent years. This has made solar power cheaper and easier to use. But it is still not clear how useful these new developments in solar power technology are. [语篇解读]　本文是科普说明文，主要介绍了印度科学家的一项新发明——一种被称为太阳能树的新设备。 1．Which picture can show the solar tree in the passage? C　[细节理解题。根据第一段中的“Solar trees have metal ‘branches’...are flat surfaces”可知，这种太阳能树有从中心高杆上伸展出的高矮不一的金属“树枝”，每根树枝上都装有一个太阳能电池板。] 2．What does Bedi say about the solar trees? A．They are space­saving. B．They are energy­co