【判断题】发电机调节器中节流器主要是限制发电机的输出电流,使之不超过额定值,防止输出电流过大,而烧坏电枢线圈。
【简答题】Questions 22 to 25 are based on the passage you have just heard. 22.A) Messaging while driving. B) Chatting while driving. C) Driving under age. D) Speeding on highways. 23. A) A gadget to hold a phon...
【单选题】With vehicle speed between ______ MPH, the EBCM performs a dynamic test of the modulator valves and pump motor.
【单选题】________is used to measure the mechanical power of the vehicle at the drive wheels and provide the operator with readout in units of road speed and power.
B.
Wheel Dynamic Balancer
C.
Automobile speedometer tester
【简答题】男性,14岁。眼睑下肢水肿,尿少1周入院。过去病史无特殊。阳性体征:眼睑、球结膜及下肢水肿,腹水征(+)。尿检示颗粒管型,尿蛋白3.0g/dl,腹水细菌培养阴性,血尿素氮8.0mmol/L.血清清蛋白25g/L,肝功能正常。于是用泼尼松40mg/d治疗,同时卧床休息3周,水肿及蛋白尿未见好转。而改用环磷酰胺200mg/d治疗共6周,仍有蛋白尿。(1)临床初步诊断是什么?(2)为了诊断和治疗还需做哪...
【判断题】CRH1A动车组采用不锈钢车体、16辆编组可两组重联运行。( )
【简答题】Passage Three Questions 22 to 25 are based on the passage you have just heard. 22. A) Chatting while driving. B) Messaging while driving. C) Driving under age. D) Speeding on highways. 23. A) A gadget...
【单选题】车用直流发电机须用三联调节器,它由断流器、节流器和节压器组成,节流器的作用是()。
B.
使发电机输出电流不超过允许值,防止烧坏电枢线圈
D.
防止发电机输出电流倒流入蓄电池,将蓄电池烧坏
【判断题】轴流式风机的节流调节原理是通过改变管道阻力使风机工作点和风量得到改变的,其与离心式风机的节流调节原理不同。