易使老年人出现心动过缓、心脏停搏,并诱发哮喘()
A、胺碘酮B
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ProfessorSmithisalsothe_______oftheinternationalprogramoffice.Ifyouhaveanyproblemwhenyoustudyhere,youmaygotohimforhelp.
Healwayshasalotof_______ideasinhismind,andsometimeswedonotevenknowwhatheisthindingabout.
Heworksinouruniversityasavisiting_______,notasaformalfacultymember.
2003年教育学颁布的《普通高中课程方案(实验)》规定,我国普通高中课程改革由学习领域、科目和模块三个层次构成,这属于()
已知直线l是圆X?+Y?=5在点(1,2)处的切线,则l在y轴上的截距是()