LTE下行ACK/NACK信令BER目标中ACK→NACK错误的目标质量为() ["10-1,","10-2,","10-3,","10-4."]
压气机转子的基本形式有:(). ["鼓式、盘式","轮式、鼓式","鼓式、盘式、鼓盘式","轮式、盘式、轮盘式"]
钢液的凝固点永远高于纯铁的凝固点。
AUTORK执行器是利用()来测量电机蜗杆推力的反作用力。 ["A、测量频率变化","B、测量电压变化","C、压力传感器","D、压敏电阻"]
LTE下行ACK/NACK信令BER目标中NACK→ACK错误的目标质量为() ["10-1,","10-2,","10-3,","10-4."]
什么是会计专用印章?它的刻制实行什么管理?