内容正文:
专题三 完形填空
第三节 说明文
(2019·全国卷Ⅲ)The small town of Rjukan in Norway is situated between several mountains and does not get direct sunlight from late September to midMarch—__41__six months out of the year.
“Of course,we__42__ it when the sun is shining,”says Karin Ro,who works for the town's tourism office.“We see the sky is__43__,but down in the valley it's darker—it's like on a__44__day.”
But that__45__when a system of hightech__46__ was introduced to reflect sunlight from neighboring peaks(山峰)into the valley below.Wednesday,residents(居民)of Rjukan__47__their very first ray of winter sunshine:A row of reflective boards on a nearby mountainside were put to__48__.The mirrors are controlled by a computer that__49__them to turn along with the sun throughout the__50__and to close during windy weather.They reflect a concentrated beam(束)of
light onto the town's central__51__,creating an area of sunlight roughly 600 square meters.When the light __52__,Rjukan residents gathered together.
“People