肺癌空洞的X线表现为()
A.薄壁空洞,内壁光滑
B.薄壁空洞,内壁凹凸不平
C.厚壁空洞,内有液平
D.厚壁空洞,内壁凹凸不平
E.以上都不是
参考答案:D
— is the hotel?
— It's across from the post office. [ ]
A. Where
B. What
C. When
D. How
在图方框中画出合适的镜具.