单项选择题
A.Tearing through the member is more likely in this type connection
B.The weld may be broken by the stresses caused by riveting
C.The weld increases the tensile stress on the rivet heads
D.The welding must be completed before the riveting commences
单项选择题 Should the vessel have no deratisation certificate at the time of her delivery，she（）be held to be unseaworthy.
单项选择题 Prior to burning or welding on a fuel tank on a ship，regulations require that an inspection be made. An entry in the unofficial logbook is required if this inspection is made by（）.
单项选择题 Please arrange the survey（）early．