题型:名词解释 下列反应中,属于取代反应的是( )①CH3CH=CH2 + Br2 CH3CHBrCH2Br②CH3CH2OH CH2=CH2 + H2O③CH3COOH + CH3CH2OH CH3COOCH2CH3+H2O④C6H6 + HNO3 C6H5NO2+H2OA.①②B.①③C.②④D.③④ 查看答案
题型:名词解释 患者,女,30岁,有风湿性心脏病史,发生心律不齐4年,每天上午服用地高辛1片治疗,近来自感食欲减退、恶心,前来就医。查心率94次/分,心律绝对不齐,心电图示房颤、频发室性期前收缩。上述情况提示很可能发生了()。A.心力衰竭B.阵发性房颤C.胃肠型感冒D.洋地黄中毒E.药物过敏 查看答案
题型:名词解释 The reporters have found out ____ it was _____ saved the little girl.A.who; whoB.who; thatC.whom; thatD.whom; who 查看答案