胸片表现:右上肺可见一片状、絮状阴影,边缘模糊。应诊断为()
A.周围型肺癌
B.大叶性肺炎
C.浸润性肺结核
D.支气管扩张
E.慢性阻塞性肺气肿
参考答案:C
—Have you finished the work?
—Not yet, but we'll keep _______ until we make it. [ ]
A. failed
B. trying
C. tried
D. failing
维A酸类药物口服不良反应有()
A.高血脂
B.皮肤黏膜干燥
C.消化道出血
D.骨骺早期闭合
E.致畸