支气管扩张患者,CT示扩张的细支气管比伴行肺动脉粗,两者共同构成的影像,称为()
A.葡萄征
B.印戒征
C.晕环征
D.手套征
E.轨道征
参考答案:B
“ We can’t go out in such bad weather,” said Susan, ___ out of the window.
A.looked
B.to look
C.having looked
D.looking
正常成年男性的血细胞在血液中所占的容积百分比是
A.20%~30%
B.30%~40%
C.40%~50%
D.60%~65%
E.65%~70%