It was sunny and ____ again at this time of year. John went to the beach to ____ his weekend. He was lying on the sand and ____to music. Suddenly he ____ someone crying for help. He ____ up hurriedly and looked towards the voice. He saw a little boy waving(挥动) his hands in the____a little far away. He ____ off his clothes and jumped into the water____. He swam to the little boy, held him, kept his head ____ the water and swam back to the beach. At last, the boy was safe. He thanked John a____.

关于俄罗斯工业叙述错误的是（　　）

读诗《望洞庭》，选择合适的解释

湖光秋月两相和，潭面无风镜未磨。____

①“和”的意思是相安、和谐。

②“和”的意思是连词，跟‘同“相同。

③“镜”指的是一面铜镜。

④“镜”指的是洞庭湖的湖面。