总结概括问诊内容为“十问歌”的医家是( )
A．张仲景
B．喻嘉言
C．张景岳
D．李时珍
参考答案：C
There are usually ________ days in February. [ ]
A. twenty-eight
B. twenty-nine
C. thirty
D. thirty-one
铅增感屏上的深度划伤在射线底片上呈白色条痕
