下列哪些临床分期的HL适合做扩大照射治疗（）
A.ⅠA期
B.ⅡA期
C.ⅢA期
D.ⅠB期
E.ⅢB期
参考答案：A, B
— Have you given Mr. Li the message?
— Not yet. I will give it to him as soon as he ______. [ ]
A. is coming back
B. came back
C. comes back
D. will come back
一个供电系统的（）是指该系统两次故障的间隔时间。
A.稳定性
B.故障率
C.可用性
D.可靠性
