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
