题目

Jim suffered heart problems. In conversation he expressed little joy and it seemed that his life was drawing to a close. When his heart problems led to operation, Jim went through it successfully, and a full recovery was expected. Within days, however, his heart was not beating properly. Jim was rushed back to operation, but nothing was found to explain the cause of his illness. He died on the operating table on the day before his 48th birthday. Dr. Bruce Smoller, a psychologist (心理学家), had had many conversations with him, and the more he learned, the stranger he realized Jim's case wa东南亚的主要粮食作物是（　　） A、水稻B、水稻、小麦C、小麦D、高粱、玉米