题目

Robert Louis Stevenson was born in Edinburgh in Scotland in 1850. He had to end his college studies because his health was poor. He began to travel, looking for a place that was good for his health. And he wrote about his travels. Inland Voyage(1878) was about journeys by canoe(独木舟) on the rivers and canals of Belgium and France. Travels with a Donkey in the Cevennes followed it in next year. People loved his travel books, and they also found his poems beautiful. In 1879 he travelled to California in a very uncomfortable ship and then by train across the United States to San Franc（1）计算：；（2）解不等式组：．