IOPP（国际防油污证书）适用于150总吨及以上的油船和400总吨以上其他船舶。（
参考答案：对
. After her son gave his life for the country, Sally was well provided____________.
A．with
B．for
C．on
D．/
为什么要建立交接班制度？如何交接？
