安全阀能否正确安装,对阀门的工作状况、泄漏、排泄量等诸性能有极大的影响。
参考答案:对
It_____we had stayed together for several weeks_____ I found we had a lot in common.
A.was until; when
B.wasn’t until ; that
C.wasn’t until; when
D.was until; that
肝源性水肿患者不伴有的体征是()。
A.肝-颈静脉反流征阳性
B.双下肢水肿
C.蜘蛛痣
D.腹壁静脉曲张
E.脾大