下述对骨髓增生性疾病共同特点描述正确的是（） A.无髓外造血现象 B.以淋巴细胞
题型：单项选择题
问题：
下述对骨髓增生性疾病共同特点描述正确的是（）
A.无髓外造血现象
B.以淋巴细胞系统增生为主
C.各症状之间可以相互转化
D.造血功能障碍
E.脾脏常不肿大
题型：单项选择题
Several years ago, a farmer owned some land along the sea. He advertised for workers, but no one wanted to work for him. Most people didn’t want to work there 31 they didn’t like the bad storms. Finally, a  32 man, who looked weak and more than fifty years old, came to see the farmer. “Are you a good farmhand?” the farmer asked him.“Well, I 33 sleep well when the wind blows.” answered the little man.Although the answer was strange, the farmer let the man stay to work. The little man worked 34 around the farm, busy from morning till evening. The farmer felt very pleased with his work. Then one night the wind began to blow strongly. Jumping out of the bed, the farmer 35 into the little man’s room. He shook the little man and cried, “Get up! A 36 is coming!” The little man said slowly, “No sir, I told you----I can 37 well when the wind blows.” The farmer was very angry, but he had to hurry outside to get ready for the storm. To his 38 , everything was ready outside. 39 could be blown away. The farmer 40 what the man meant, so he returned to his bed to sleep while the wind was still blowing.
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