题型:填空题 关于双源CT的描述,错误的是A.双源CT的球管仍采用电子束控X线管B.双源CT的两个球管只能同时工作,不可分别使用C.双源CT在用于心脏成像时可比64层CT减少一半的扫描时间D.双源CT的球管和探测器系统与64层CT相同E.双源CT的球管总功率为160kW 查看答案
题型:填空题 The old man feels very _________because all his children have gone abroad and his wife _________ for almost two years.A.alone, has diedB.lonely, diedC.lonely, has been deadD.alone, has been dead 查看答案