如果雇主拟替换工程师，则应当在预计替换的日期之前的（）天通知承包商。
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当用“搭缸”法检查，如果某一缸的火花塞接铁后，发动机运转状态不变，则说明该缸工作正常无故障。
A. 正确
B. 错误
An underwriter is liable for（）.
A. loss arising from the subject itself because of its inherent qualities
B. loss caused by the ordinary evaporation of liquids
C. loss caused by heavy weather
D. the natural decay of the vessel due to the passage of time
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