15.深空探索：奔赴“星辰大海”)-冲刺2023中考英语热点话题+重点题型提升练(通用版)

冲刺2023中考英语热点话题+重点题型提升练(通用版) 15.深空探索：奔赴“星辰大海” 一、阅读理解 1 China has just opened its FAST radio telescope (射电望远镜) to international scientists. It means scientists across the world can apply for using the telescope to do astronomical observations. FAST is short for Five-hundred-meter Aperture Spherical radio Telescope. It was completed in September 2016 and it officially began operating in January 2020. Measuring 500 meters in diameter, FAST is the world’s largest single-dish radio telescope, and is 10 times more sensitive than the 100-meter Radio Telescope Effelsberg in Germany. The major scientific task of the telescope is the observation of pulsars(脉冲星). The study of pulsars can help to confirm the existence of gravitational radiation (引力辐射) and black holes, and help solve many other major questions in physics. Another major scientific goal of FAST is to search for life outside the Earth. The telescope is located in a naturally deep and round karst depression (喀斯特洼地) in southwest China’s Guizhou Province. The first advantage of the selected site is the altitude (海拔). The average altitude of Guizhou is about 1,100 meters. Generally, the higher the altitude is, the more the telescope can observe. Secondly, the radio telescope needs to have a “big pan” to receive better signals. The huge natural depression could reduce the difficulty of construction.Moreover, the selected site in Guizhou is far away from cities, and has a low population density.which reduces the interference (干扰) caused by wireless devices such as TVs, mobile phones and radios from human activities. So far, FAST has found over 300 pulsars. Experts predict that the number could reach 1, 000 in five years and that the telescope could find and locate (定位) the first pulsar outside the Galaxy. Let’s wait and see more fantastic discoveries. 1. Which of the following is TRUE about FAST? A. Only Chinese scientists can use FAST. B. FAST started working officially in 2020. C. FAST is the world’s second large