气门导管的内表面与气门杆的配合间隙一般为()mm。
A.0.05~0.08
B.0.08~0.10
C.0.05~0.10
D.0.05~0.12
参考答案:D
—Rita, your Chinese is very good. _____ have you been in China?
—Since I was five.
[ ]
A. How long
B. How far
C. How soon
D. How often
5岁患儿,男,咳喘反复发作二年余。昨日突发咳喘,喉间痰鸣,声高息涌,张口抬肩,呼气延长。临床诊断最可能是()
A.咳嗽
B.感冒挟痰
C.肺炎喘嗽
D.哮喘
E.顿咳