下列描述错误的是( )。A.闭环控制系统的精度通常比开环控制系统的精度高 B.开环 发布时间:2017-06-15 01:20 │ 来源:www.tikuol.com 题型:单项选择题 问题: 下列描述错误的是( )。A.闭环控制系统的精度通常比开环控制系统的精度高B.开环控制不存在稳定性的问题C.闭环控制系统总是稳定的D.反馈可能引起系统的振荡
题型:单项选择题 Do you like pop music? Most people 1__. One of the best bands on the music scene 2__ the New Ocean Waves. In the last twelve months, they’ve 3__ three major concerts and made a hit CD. They’re going to 4__ on CCTV next month. And then they’re going to go on a world tour in which they will perform in ten 5__ cities. Be sure not to 6___ them if they come to a city near you – if you can get tickets, that is. “ 7___ years, we played other people’s songs”, says lead singer Zhu Wen. “ But now we play 8___ our own songs. We’ve had _9_ _ songs in the top ten, but we really hope to have a number one hit some day.” Good luck to the New Ocean Waves. They’re 10___ to a great start. And they’re really nice people. Did you know that they gave half of the money they made to a charity for homeless children?小题1:A.doesB.do C.didD.done小题2:A.is B.was C.has D.had小题3:A.hasB.was C.had D.were小题4:A.comeB.go C.appear D.find小题5:A.the sameB.same C.difficult D.different小题6:A.miss B.catch C.holdD.lose小题7:A.With B.For C.In D.At小题8:A. most B. less C. mostly D. little小题9:A.a little B.a few C.little D.few小题10:A.in B.offC.ofD.without 查看答案
题型:单项选择题 烧伤病人留置导尿管的必要性包括()A.作为观察有无休克的重要临床指标B.根据尿量多少随时调整输液的速度与成分C.观察血红蛋白尿的转归过程D.便于留取尿标本化验E.便于会阴部创面处理 查看答案