【单选题】Do not install the equipment in a location which is exposed to direct rays of the san.
B.
在太阳光能够直接到达的地方,不能安装该设备。
【判断题】Decentralized vacuum pump is suitable for filling machine internal space is not enough to install centralized vacuum pump, gasoline sales volume is not large gas stations.
【单选题】The power factor is a measure of the phase difference between voltage and current and is expressed as the_____ of the phase angle.
【单选题】婴儿,6个月。高热10余日,咳嗽,气促,其母患肺结核,体检:精神委靡,面色苍白,双肺呼吸音粗,肝肋下2.5 cm,脾触及边缘,前囟膨隆,颈强(±),OT 试验阴性,胸片:双肺中外带均有粟粒状阴影。OT试验出现阴性反应,最可能的原因为
【单选题】What is NOT mentioned about the solar backup system?
A.
It is easy to install.
B.
It requires little maintenance.
【单选题】6个月。婴儿,因发热、咳嗽、气促2天,诊断为支气管肺炎入院长。于病程第3天体温更高,抽搐2次,嗜睡进而昏迷。前囟稍隆起,巴氏征阳性
【单选题】With a purely resistance load the voltage and current are in phase, giving a power factor of _____.
【单选题】7个月婴儿,高热、咳嗽6天,气促3天,今日抽搐3次。已接种卡介苗。查体:体温39℃,脉搏180次/分,呼吸70次/分。处于昏睡状态,面色发绀,双目凝视。前囟稍饱满,双肺散在细湿罗音,肝肋下3.5cm,颈软,克氏征阴性,巴氏征阳性。血白细胞9乘以十的九次方/L,中性粒细胞0.35,淋巴细胞0.65。脑脊液:外观清,蛋白定性阴性,细胞数2乘以十的六次方/L,糖3.7mmol/L,氯化物118mmol/...
【单选题】Policies are also an important factor for the car market ______ the purchasing power of people.