One day, long long ago, a little baby was born(出生). His name was Jesus(耶稣). Jesus was a special baby. Many people said he was the son of God(上帝). When he was born, a new star was in the sky. Three wise men saw the star. They followed the star to Jesus. They brought the baby special gifts. When the baby grew into a man, he was a great teacher. He taught people to love God and to love each other. Jesus's birthday，December 25th, is Christmas Day. We give gifts to our friends and family at Christmas. We put stars on our Christmas trees, too.

保护生物多样性最有效的措施是（　　）

2017年7月，5名游客计划从兰州自驾车沿图所示线路进行“丝绸之路深度游”，追寻古文明的踪迹，饱览塞外风光。