当发电机调相运行时，有功表和无功表分别显示（）。 A.＋P、＋Q； B.－P、－Q； 发布时间：2017-08-25 00:10 │ 来源：www.tikuol.com 题型：单项选择题 问题： 当发电机调相运行时，有功表和无功表分别显示（）。A.＋P、＋Q；B.－P、－Q；C.＋P、－Q；D.－P、＋Q。
题型：单项选择题 从方框中选择适当的副词，每个词只能用一次。often why away politely outsidetoo how always suddenly heavily1. I _____________ go to school by bike.2. Tony spoke _____________ to his grandma.3. The cleaners are moving the rubbish _____________.4. John is _____________ late for school, and this made his teacher very angry.5. _____________ are you unhappy? Because I can't go on holiday with my family.6. The children are playing games _____________.7. Henry is _____________ young to drive a car.8. _____________ do you like the dishes? Very good.9. The driver braked (刹车) _____________ when he saw a dog ahead.10. It is raining _____________. 查看答案
题型：单项选择题 She had just finished her homework _____ her mother asked her to practice playing the piano yesterday. [ ]A. when B. while C. after D. since 查看答案
题型：单项选择题 填充色谱柱的制备过程为（）。A.色谱柱管的处理、固体吸附剂或载体的处理、载体的涂渍、色谱柱的装填B.色谱柱管的处理、固体吸附剂或载体的处理、载体的涂渍、色谱柱的老化C.色谱柱管的处理、固体吸附剂或载体的处理、色谱柱的装填、色谱柱的老化D.色谱柱管的处理、固体吸附剂或载体的处理、载体的涂渍、色谱柱的装填、色谱柱的老化 查看答案