He worked his ________to Australia, and paid for the journey by doing jobs on the ship he was

travelling on. [ ]

A. patience  

B. passage

C. way  

D. strength

下列有关直接法荧光抗体试验的叙述中，不正确的是( )

A．简单易行，特异性好
B．敏感性较间接法差
C．可对抗原或抗体进行检测
D．检测一种抗原需要制备一种荧光抗体
E．以上都是