What do we learn about Bill？
A. He had his two teeth pulled out.
B. He paid a lot for his dental care.
C. He had a quarrel with his dentist.
D. He had to ease his toothache first.
关于鞍区CT扫描后处理技术，叙述错误的是
A. 根据不同的部位和病变灵活选用窗宽和窗位
B. 若病变和周围组织密度接近时，可适当调窄窗宽
C. 若伪影较多或需观察局部组织的丰富层次，可调低窗位，并适当调宽窗宽
D. 若伪影较多或需观察局部组织的丰富层次，可调高窗位，并适当缩小窗宽
E. 鞍区CT图像常用软组织窗和骨窗
采用瑞氏染色法染色，易呈两极着色的是
A. 多杀性巴氏杆菌
B. 沙门氏菌
C. 布鲁氏菌
D. 链球菌
E. 猪丹毒杆菌
交流电源监控器负载显示窗用于显示左或右静变器输出的：
A. 功率的大小
B. 频率数值
C. 电流的大小
D. 电压数值
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