【单选题】下列有关氧化还原反应的叙述 中,正确的是
【单选题】男性,45岁。反复胸闷、心悸、端坐呼吸、胸腔稠液半年。查体:呼吸短促,两肺广泛细湿啰音,心浊音界扩大,心率100次/分,呈舒张期奔马律,偶发前期收缩。X线胸片示心胸比率0.65,两肺水肿。心电图示完全f生左束支传导阻滞,偶见室性期前收缩。超声心动图提示左心室明显增大,舒张末期内径70mm,左室整体运动减弱,射血分数(EF)为24%,缩短分数(FS)为12%。最可能的诊断是()
【单选题】Why does the professor clarify the concept of a 'fairy'?
A.
To explain the origins of the term 'fairy tale'
B.
To eliminate a possible definition of the term 'fairy tale'
C.
To support a claim about the function of fairy tales
D.
To indicate that fairies are a major element in fairy tales
【单选题】椭圆 x 2 a 2 + y 2 b 2 =1 (a>b>0) 顶点A(a,0),B(0,b),若右焦点F到直线AB的距离等于 1 2 |AF| ,则椭圆的离心率e=( )
【简答题】A.In the front of the white pages. B.Right after the white pages. C.At the end of the telephone book. D.On the first page of the telephone book.
【简答题】给下列句中的“啊”注音 她的歌声多好听啊( )
【判断题】.服务顾问从维修技师的诊断中进行了大体的维修估计。在将估计的情况告诉客户之前,服务顾问首先应当弄清楚有无所需要的零件。( )