第10题: [单项选择]石油产品的酸值单位是()。 A. mgKOH/g B. mgKOH/100mL C. mgKOH/mL D. mgKOH/100g 参考答案:A
第11题: [单项选择]Which of the following statements is NOT true of nuclear plants in Britain A. They have caused a series of power failures recently. B. They have betrayed trust of the general public. C. They need improvement in management. D. They demand promotion of security awareness. 参考答案:A 答案解析:事实细节的找寻和判断。根据题干要求,找寻到原文有关英国的部分,发现第一段第三句可满足解题需要“In Britain,where managerial incompetence and negligen
第25题:[单选题] 某工业客户变压器容量为500kVA,装有有功电能表和双向无功电能表各一块。已知某月该户有功电能表抄见电量为40000kWh,无功电能表抄见电量为正向25000kVarh,反向5000kVarh,复核电费时,该户的功率因数为(____)。 A. 0.8 B. 0.81 C. 0.82 D. 0.83 参考答案:A