下列哪个选项不是在CDU的主菜单上？（）
A.FMCS
B.导航数据
C.客舱管理系统
D.卫星通讯系统
参考答案：B
The parents seemed satisfied with the news __________ their son had been employed by a large company.
A．what
B．which
C．that
D．when
如何理解“彼一切非我、不异我、不相在”？
