- 问题详情:已知*A={x|y=},B={x|-1≤2x-1≤0},则CRA∩B= A.(4,+∞) B.[0,] C.(,4] D.(1,4]【回答】 B知识点:*与函数的概念题型:选择题...
- 7785
- 问题详情:已知*A={x|y=},B={-2,-1,0,1,2,3},则(CRA)∩B=A.{-2,-1,0,1,2} B.{0,1,2,3} C.{1,2,3} D.{2,3}【回答】D知识点:*与函数的概念题型:选择题...
- 15618
- 问题详情:已知*A={x|3≤x<7},B={x|2<x<10}.求CR(A∪B); CR(A∩B); (CRB)∪A; (CRA)∩B【回答】知识点:*与函数的概念题型:选择题...
- 10160
- 问题详情:下列说法不正确的是()A.H+H→He+n是聚变B.U+n→Xe+Sr+2n是裂变C.Ra→Rn+He是α衰变D.Na→Mg+e是裂变【回答】D解析原子核的变化通常包括衰变、人工转变、裂变和聚变.衰变是指原子核放出α粒子或β粒子后,变成新的原子核的变化,如本题中的C和D两选项.原子核的人工转变是指在...
- 18893
- 问题详情:Attheageof14,HughEvansspentanightwithcockroaches(蟑螂)crawlingalloverhim.Thatexperienceturnedouttobelife-changingforEvans,now30.FarremovedfromhiscomfortablehomeinAustralia,hetraveledtothePhilippineswithanaidorganizationthatsethimupwithahostfami...
- 15812
- 1、Chronicrespiratoryalkalosis(CRA),CRAplusmetabolicalkalosisandmetabolicacidosisareseldom.2、StorageconditionsandtemperaturelogswillbecheckedbytheCRAduringMVandreported.3、ColorDopplerimagingsuggestedredbloodflowsignalofcentralretinalartery(CRA)bran...
- 31122