对于JT1-CZ2000型机车信号的非点灯信号,采用()输出方式。
A、变压器
B、光耦
C、直接
D、继电器
参考答案:B
I have been living in the United States for twenty years, but seldom ___ so lonely as now. [ ]
A. have I felt
B. I had felt
C. I have felt
D. had I felt
患儿,2岁。发热,体温38℃,鼻塞流涕,咳嗽,皮疹初现,疹色红润,点粒稀疏,躯干为多,多为丘疹,少数疱疹,舌苔薄白,精神尚可。治法是()
A.疏风宣肺止咳
B.疏风清热解毒
C.辛凉解表透疹
D.辛温宣肺透疹
E.清热凉营解毒