【单选题】在决策过程中,消费者收集各种产品或服务的信息被称做( )。
【单选题】Speaker A: Don ’t you play golf ? Speaker B: ________
A.
Yes. No sport interestsme more than golfing
B.
Yes. I have never played golf in my life
C.
No. Only once in a while
D.
Yes. And Ihate to spend much moneyon sports.
【单选题】家用瓶装液化石油气的主要成分是烷烃和烯烃系列的混合物,1标准大气压下各成分的沸点如下表.液化石油气很难用尽,瓶内常有残留物,在大田县的日常温度(10℃-25℃)下,该残留物的主要成分是( ) 物质名称 甲烷 乙烷 丙烷 丁烷 戊烷 乙烯 丙烯 丁烯 戊烯 沸点/℃ -161.7 -88.6 -42.2 -0.5 36.1 -102.4 -47.7 -6.5 30.1
【简答题】某大型石化企业液化气站有8000m 3 球形罐2个,1000m 3 球形罐5个,分两行排列,罐区设有防护堤,储罐设有喷淋冷却系统。某日一个1000m 3 球罐罐底排污阀贴靠罐壁阀门的法兰垫圈坏损,造成带压泄漏。消防队到场后侦察检测,在厂方的配合下,成功地处置了该起事故。液化石油气的主要成分有哪些?爆炸浓度极限是多少?
【简答题】液化石油气有两个来源,分别是油气田和(),液化石油气的主要成分是()
【简答题】B. Fill in the blanks with the expressions given below. Change the form where necessary. be down to call in beat up wind up trial and error at all costs 1.Don ’t____ yourself___...
【单选题】John: Hurry up! We don’t have much time left. Peter: ________ We still have two hours. Jone: Come on! This is my first time ever to take a plane. I don ’t want anything to go wrong.