该病例最有可能诊断是()
A.左房黏液瘤
B.左房巨大血栓
C.左房恶性肿瘤
D.左房转移瘤
E.以上都不是
参考答案:A
简述细胞学诊断的局限性。
Experts think that ________ recently discovered painting may be ________ Picasso. [ ]
A. the; /
B. a; the
C. a; /
D. the; a