10 . 阅读下列短文,根据短文内容或括号内所给词的恰当形式填空。
A Fuxing train departed from Nanning City, the capital of south China’s Guangxi Zhuang Autonomous Region on Thursday morning, 1 (mark) the launch of high-speed rail service in the karst regions of southern China.
The 482-kilometer railway, which connects Nanning with Guiyang, the capital of Southwest China's Guizhou Province, is designed 2 (facilitate) a top speed of 350 kilometers per hour, reducing travel time from over five hours to about three hours. 3 a major transportation artery (干线) in southern and southwestern China, it will 4 (significant) benefit residents in the mountainous areas and boost 5 (region) ·socioeconomic growth (社会经济增长) along the route, according to China State Railway Group, the national railway operator.
This railway is the first of its kind to be built in either Guizhou 6 Guangxi, both of which are known for their karst landscapes posing 7 obstacle to railway construction. The railway’s construction, which started in December 2017, was a challenge for its architects and engineers because its 8 (plan) route included areas with different geographic 9 (feature), including mountains, valleys and rivers. So far, the operator 10 (announce) three types of service schedules for weekdays, weekends and the peak