有线单或双死点模式中，RTU中DI2状态指示灯灭表示无下死点信号（高原机、游梁机、异型机等）。（）
参考答案：对
凉燥咳嗽宜选用
A．枳实导滞丸B．乌头桂枝汤C．少腹逐府汤D．暖肝煎E．神术散
We have had to raise the prices of our products because of the increase in the cost of materials.
A．primitive
B．rough
C．original
D．raw
