食管癌病人胸腔闭式引流出现大量淡黄色液体，考虑（）
A.胸腔感染
B.食管吻合口瘘
C.胸腔活动性出血
D.乳糜胸
E.肺不张
参考答案：D
This pair of shoes _______. [ ]
A. is her
B. is hers
C. are hers
D. are her
