瓦斯保护中，当重瓦斯由跳闸位置切换至信号位置时，用电阻代替（）继电器的电压线圈。
A.电流
B.电压
C.中间
D.信号
参考答案：C
When it was his turn to deliver his speech，________，he walked towards the microphone.
A．nervously and embarrassingly
B．nervous and embarrassedly
C．nervously and embarrassing
D．nervous and embarrassed
锦纶长丝筛网(规格为120目，纱罗组织织造)
