The three sisters decided to hold a family party to ________ their parents’ silver wedding.

A．welcome

B．congratulate

C．memorize

D．celebrate

船舶在机舱部位发生搁浅时，值班轮机员首先考虑要做的事是（）

A.准备好舱底水系统，关搁浅一舷海底阀，换另一舷海底阀

B.加大油门，冲出浅滩

C.按轮机长命令操作主机，测量有关油位

D.全上盘车机，检查轴系情况