离心泵出口管线压力过高，使流量增加，离心泵驱动机过载跳闸。 发布时间：2017-07-29 20:10 │ 来源：www.tikuol.com 题型：判断题 问题： 离心泵出口管线压力过高，使流量增加，离心泵驱动机过载跳闸。
题型：判断题 十一届三中全会后农村实行的“家庭联产土地承包责任制”，突破了“一大二公”大锅 饭的旧体制，极大地调动了农民的积极性,促进了我国农村经济的发展。上述改革的哲学依据在于①生产力决定生产关系 ②生产关系一定要适应生产力犾况③经济基础决定上层建筑 ④上层建筑一定要适应经济基础状况A．①②B．②③C．①④D．③④ 查看答案
题型：判断题 阅读理解。 Your computer has been playing music for years, one CD at a time. Now hundreds of songs can be stored in your PC if they' re in the MP3 format (格式). What is it? MP3 compressed(压缩) music into small computer files. You may download MP3 music several ways: Music can be downloaded from websites that have turned wide music librariesinto MP3. Once MP3 music is on your PC's hard drive, you can play it through your computer'sspeakers, "burn" it onto blank CDs or swap(交换) MP3 files with friends using e -mail. How much? Software needed to play and convert MP3 music is often free. Compact portable MP3 playersstart at around $ 40 and can hold hundreds of songs. A blank CD on which you can record music costs about a dollar. Advantages MP3 turns your home PC into a jukebox(自动唱机) . Small MP3 players are the size of a deckof cards(一副牌), making it easy to take hundreds of songs with you. Disadvantages You may find that some websites only allow you to listen but you can't download music. Otherslet you download music but can't be copied to MP3 players. And a growing number of new CDs make it impossible to copy songs to a computer.1. How can you get MP3 music?A. By turning your home PC into a jukebox. B. By taking your own music or songs with you. C. By copying songs to a PC through the speakers.D. By downloading from websites, which have turned music libraries into MP3.2. What is the closest meaning of the underlined word "burn"?A. Copy. B. Play. C. Store. D. Change.3. Which is NOT true according to the passage?A. MP3 music is often free.B. MP3 music can be "burned" onto blank CDs or be swapped with friends by e -mail.C. MP3 music can be taken along while traveling.D. A growing number of new CDs make it possible to copy songs to a computer.4. How much will you pay for a compact portable MP3 player?A. Free. B. At least 10 dollars. C. About forty dollars. D. About a dollar.5. How many disadvantages of MP3 can we see from the passage?A. 2 B. 3 C. 4 D. 5 查看答案
题型：判断题 男，40岁，肝硬化3年，右上腹痛3个月，突然加重4h，既往无胃病史，查体：血压70/50mmHg，腹部膨隆，有压痛和反跳痛，最可能的诊断是（）A.急性阑尾炎穿孔B.胃穿孔C.肝癌结节破裂D.慢性胆囊炎急性发作E.胆囊坏疽伴穿孔 查看答案