法兰接头渗漏时，可用扳手按对角次序稍拧紧螺柱，消除渗漏。
参考答案：对
惊悸病名最早由哪位医家正式提出
A．张仲景B．巢元方C．张景岳D．朱丹溪E．孙思邈
Blocks and falls used as lifeboat gear must be designed with a minimum safety factor of（）.
A.4，based on the breaking strength
B.5，based on the maximum allowable stress
C.6，based on the maximum working load
D.8，based on the normal working load
