. TRƯ ỜNG THPT CHUY ÊN LÊ QUÝ ĐÔN Đ Ề THI THỬ ĐẠI HỌC LẦN 1 - NĂM H ỌC 2012 - 2013 (Đề thi gồm 06 trang, 80 câu trắc nghiệm) MÔN: TIẾNG ANH - Thời gian: 90 phút KHỐI D/A1 Mã đề thi 369. optical fibers have transformed communication, they are also revolutionizing medicine. These ultra- thin, flexible fibers have opened a window into the living tissues of the body. By inserting optical. The basic fiber- optics system is called fiberscope, which consists of two bundles of fibers. One, the illuminating bundle, carries light to the tissues. Is is coupled to a high-intensity light