Yang Liwei, the nation’s first spaceman, disappointed a lot of Chinese when he said he did not see the wall during his orbit of less than 24 hours in October 2003, giving rise to calls for revisions(修改) in textbooks.

　　But there is a rider: There are many, many structures which can also be seen, such as the Pyramids of Egypt, airports, highways and even Beijing’s Third Ring Road.

　　Undoubtedly, it requires an atmospheric “ perfect storm” in outer space, defined as an altitude of about 350 km and you have to be in the right place at the right time, under the right conditions to spot a particular structure. Chinese-American spaceman Leroy Chiao, who has been on three space flights and is currently coming to the end of his six-month stint(期限) on the joint US-Russian space station, has provided the first photographic evidence of sections of the Great Wall using commercially available equipment.

　　According to Chiao, the chances of shooting the Great Wall area are “maybe once every few days and only during daylight every three months. ” Since late March, Chiao has had just one opportunity to fly over the Great Wall, but the weather was dangerous. He has one last chance before he is scheduled to land in Kazakhstan on April 25—and he will be keeping a sharp lookout.

　　17. Now the education officials “can breathe easy” because they know_____.

　　A. they don’t need to change the textbooks

【山西省2017高考英语二轮复习专题训练：阅读理解（15）】相关文章：

★ 名师总结高考英语二轮复习需要做好的6件事

★ 湖南省汝城二中2014届高考英语一轮复习阅读训练 (23)

★ 【优化方案】2017届高考英语二轮复习全国卷Ⅱ题型重组训练：第3组（含解析）

★ 2014高考英语（新人教版）一轮基础训练（4）A、B卷（附答案或解析）

★ 安徽省淮南市2014高考英语一轮单项选择及文章训练（3）及答案

★ 2014届高考英语一轮复习必修1参考答案（外研版）

★ 备战2016高考一轮英语复习必须要依托课本

★ 【北京专用】2014届高考英语一轮复习方案课时作业：必修2 Unit 5 Music

★ 湖南省长沙县实验中学2016届高三英语二轮复习书面表达复习重点话题指导专题04 传统文化话题指导（学生版）

★ 2017高考四川省广安市英语阅读理解一轮系列训练：10（含解析）