铁锈色痰常见于
A.慢性支气管炎B.大叶性肺炎C.肺脓肿D.肺结核E.支气管扩张
参考答案:B
解析:铁锈色痰是由于血红蛋白变性所致,常见于急性肺水肿、大叶性肺炎、肺梗死。
He planned __________ time with his family during May Day.[ ]
A. spends
B. spending
C. to spend
D. spend
4115-V12过滤器内部装有()。
A.丝网
B.海棉
C.普通不锈钢滤芯
D.粉末烧结滤芯