下列哪个不是航路上应当设置的设备()。
A、导航设备
B、气象设备
C、障碍灯
D、地面监视设备
参考答案:C
Much to his joy, the old man may be able to get a hardship _____ from the government, which covers his expense.
A.insurance
B.allowance
C.competence
D.circumstance
男,56岁,原发性肝癌手术后3个月,门诊复查,下列哪一项是不必要的
A.癌胚抗原
B.胸部X线片
C.肝功能检查
D.肝B超检查
E.甲胎蛋白测定