船舶电气设备的检修、保养、安装等作业应由本船的（）进行。
A、值班机工
B、电气人员
C、主管轮机员
D、B或C
参考答案：D
—What does her boyfriend look like?
—______. [ ]
A. He is intelligent and confident
B. He likes playing football
C. He is quite tall with curly hair
D. He is very good
相关财务比率是同一时期财务报表及有关财会资料中两相关数值的比率，这类比率包括 ( )。
A．流动比率
B．应收账款周转率
C．销售净利润率
D．销售收入增长率
E．存货周转率
