水浸法探伤中为消除水中及探头和工件表面的气泡应如何操作？
参考答案：
为消除水中及探头和工件表面的气泡可采用除泡剂和兑水加湿的办法解决。
骨髓瘤X线表现包括（）
A.软组织肿块
B.多发性骨质破坏
C.骨质硬化
D.广泛性骨质疏松
E.骨质破坏与骨质硬化并存
A new liferaft has been installed on your vessel. The operating cord should be（）.
A.attached to the raft stowage cradle or to a secure object nearby with a weak link
B.checked to see that it's unattached
C.coiled neatly on the raft container
D.faked on deck and lead through a chock
