下列关于心房颤动的描述错误的是() A.PR间期不固定 B.心室律绝对不齐 C.频率 发布时间:2017-05-02 00:35 │ 来源:www.tikuol.com 题型:单项选择题 问题: 下列关于心房颤动的描述错误的是()A.PR间期不固定B.心室律绝对不齐C.频率>350次/分D.V,导联的颤动波最明显E.QRS波一般不增宽
题型:单项选择题 从氯酸钾、二氧化锰混合物加热制取O2后的残留固体中回收二氧化锰,以下几步操作可供选择:①蒸发溶液;②过滤;③溶解;④水洗;⑤烘干.正确操作顺序是( )A.③②④①B.③②⑤④C.③②④⑤D.③②①④ 查看答案
题型:单项选择题 I always drink _______ before I go to bed at night.[ ]A. two glass of water B. two glasses of waterC. two glass of waters D. two glasses water 查看答案
题型:单项选择题 The couple couldn't have children of their own, so they ________ a baby.[ ]A. disliked B. pretended C. adopted D. conflicted 查看答案