题目

An average but an extraordinary charitian, Matel Dawson gave away $ 1.3 million to charity over his lifetime.Born the fifth of seven children in 1921 , Matel Dawson learned the value of hard work at a young age. He left school in the ninth grade to help support his family. By the time he was eighteen, Dawson had moved to Detroit in search of a better job. In those days, the North held better prospects for an African American man. He quickly landed a job with Ford Motor Company where he worked until he retired at the age of eighty-one.Although never receiving much education, Matel Dawson valued近日在欧洲出现的急性肠道病，是由致病细菌引起的，细菌的结构特点是（　　）A．无细胞结构B．有成形的细胞核C．没有细胞膜D．没有成形的细胞核