用于温室的加温方式主要有[填空1]、[填空2]、[填空3]、[填空4]、[填空5]

未分类题有一座天然气中低压调压站，设一台雷诺式调压器，调压站的进口压力P1≥0.02 MPa，燃气密度ρ0=0.78 kg m3，若拟选DN150调压器时，Q'=885 m3 h，△P'=1 000 Pa，P0'=0.78 kg m3，调压器出口压力为P2=0.003 MPa，过滤器的阻力为0.005 MPa，则调压器流量为( )。A.3 066 m3 hB.3 200 m3 hC.3 305 m3 hD.3 726 m3 h

未分类题某一φ159×4.5、工作压力为1 MPa的水平蒸汽管道，在两支架之间有一个Q=80 kg重阀门，布置如下图所示，已知管道单位长度计算荷载为(管材重+保温重+冷凝水重)325 N m，阀门与相邻支架间距为L1=2 m，L2=6 m，支架A、B垂直荷载各为( )。A.B.C.D.

未分类题E-R模型中,'基数'是指D.与一个实体有联系的实体数目的最小值和最大值

多项选择题营业场所应该按照药品分类管理的要求和提供无差错服务的原则，采取合适而安全的方式对( )的药品进行营业布局。 A、不同品名 B、不同类别 C、不同剂型 D、不同用途 E、不同大小

未分类题Today's U.S. athletes usually avoid being like a role model since that will ruin their reputation.A.YB.NC.NG

问答题中国菜的特点有[填空(1)] 、[填空(2)] 、[填空(3)] 、[填空(4)] 、[填空(5)] 、[填空(6)] 、[填空(7)] 。

未分类题听力原文： A recent report has shown that here in the United States, we've experienced the revolution concerning our attitudes towards the work week and weekenD.Although some calendars still mark the beginning of the week 'Sunday', more and more of us are coming to regard Monday as the first day of the week with Saturday and Sunday comprising the two-day periods thought of as the weekenD.In fact, the word 'weekend' didn't even exist in English until about the middle of the last century. In England at that time, Saturday afternoons had just been added to Sundays and holidays as a time for workers to have off from their jobs. This innovation became common in the United States in the 1920s. But as the work weak shortened during the Great Depression of 1930s, the weekend expanded to 2 full days, Saturday and Sunday. Some people thought this trend would continue due to increasing automation and the work week might decrease to 4 days or even fewer. But so far, this hasn't happeneD.The work week seems to have stabilized at 40 hours made up of 5 eight-hour days. After this commercial, I'll be back to talk about the idea of adding Monday to the weekenD.(33)A.Which days people should work.B.How the week is divided into days.C.Which day begins the week.D.How many weeks there are in a month.

未分类题The word 'it' (ParA.6) probably refers to ______.A.carbon dioxideB.nitrogenC.atmosphereD.coal

单项选择题objective的中文意思是______ A. 目标 B. 谈判 C. 讨价还价

未分类题听力原文： Pulling heavy suitcases all day in the summer is hard work, especially when you are a thin 14-year-olD.That was me in 1940—the youngest and smallest baggage boy at New York City's Pennsylvania Railway Station.After just a few days on the job, I began noticing that the other fellows were overcharging passengers. I'd like to join them, think, 'Everyone else is doing it.' When I got home that night, I told my father what I wanted to do. 'You give an honest day's work,' he said, looking at me straight in my eyes. 'They are paying you. If they want to do that, you let them do that.' I followed my father's advice for the rest of that summer and have lived by his words ever sincE.Of all my jobs I've had, it was my experience at Pennsylvania Railway Station that struck with mE.Now I teach my players to have respect for other people and their possessions. Being a member of a team is a totally shared experiencE.If one person steals, it destroys trust and hurts everyonE.I can put up with many things, but not with the people who steals. If one of my players was caught stealing, he'd be gonE.Whether you are on a sports team, in an office or a member of a family, if you can't trust one another, there's going to be troublE.(33)A.They could earn much, but they must work harD.B.Many of them earned their money in a dishonest way.C.They were all from poor families.D.They were all thin, young boys.