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
-----They used to be good friends, but now they are like strangers. ----- How _____ this ______?
A.were; come about
B.did; come about
C.were; taken place
D.were; happened
涂料饰面的涂膜粗糙的基层要求()。
A.基层不平处用腻子修补填平
B.用砂纸打磨光滑
C.擦出粉尘后在施涂
D.用素水泥浆找