内镜诊断为慢性胃炎者,符合以下哪些标准,临床应考虑诊断为胃食管反流病()
A.GerdQ≧8分
B.GerdQ≧9分
C.内镜阴性
D.具有烧心和反流症状
参考答案:A, D
--Psychologists think it's bad to because thinking too much about oneself may cause depression.
--It seems that it is possible to cure depression by focusing on other people.
A. pay attention to
B. be paid more attention
C. be paid more attention to
A.变压器输出端所接电压表的示数为20V
B.变压器的输出功率为200W
C.变压器输出端的交流电的频率为50Hz
D.穿过变压器铁芯的磁通量变化率的最大值为20/n2Wb/s