临床表现为咯血伴呛咳的疾病是()
A.大叶性肺炎
B.支气管肺癌
C.肺脓肿
D.湿性支气管扩张
E.化脓性肺炎
参考答案:B
解析:咯血伴呛咳的疾病是支气管肺癌。
The young boy has come to himself in hospital now. But he ___ unconscious for three days.
A.has been
B.was
C.had been
D.is
管子切割方法有锯割、刀割、()、()、()、磨割、人工锯割、电动锯割。