单向阀又称().
参考答案:止回阀
某男性患者,69岁,近期胸憋,咳嗽,痰中带血,拍胸片发现右肺下野内侧有尖端在上,基底在下的三角形致密影,右肺门影下移。
此阴影基本病变改变应为()。
A.右肺下叶炎症
B.右肺下叶肺不张
C.右肺下叶肺间质纤维化
D.右肺肺水肿
E.右胸腔积液
The spray of water in low-velocity fog will have().
A.greater range than high-velocity fog
B.lesser range than high-velocity fog
C.about the same range as high-velocity fog
D.greater range than a solid stream