It _____ six years since his grandfather died.[ ]
A. is
B. was
C. had been
D. will be
答案:A
厚工件中的紧闭裂纹,即使透照方向适当,也()被检出。
男,60岁,金属音咳嗽1月余,伴乏力消瘦,40年吸烟史,考虑可能疾病
A.肺空洞
B.肺肿瘤
C.肺炎
D.胸腔积液
E.胸膜增厚