【单选题】听取心脏杂音,要正确掌握其要点,以下描述中错误的是( )
【单选题】关于额外心音的叙述,描述错误的是( )
A.
是指在第一心音和第二心音之外闻及的病理性附加音
【单选题】以下心交感神经对心脏活动的影响及影响机制的描述中,错误的是()
A.
由于激活β-受体,增加钙通道开放概率,收缩期室内压上升速率加大
B.
由于激活β-受体,加强4期If通道开放概率,引起正性变时作用
C.
增加房室交界细胞动作电位0期升支速度和幅度,引起正性变传导作用
D.
由于激活β-受体,室内压峰值增高,心缩期缩短
E.
心交感神经传出活动增加时,心室舒张早期室内压下降速率减慢
【单选题】Halliday stood out from the other pupils because of his ______.
B.
poor results in poetry tests
【单选题】【图片】Ellingham diagram offers a useful way to estimate equilibrium oxygen pressures as a function of temperature. This is because of the y-axis is ΔG° = R T ln peq( O2) for oxidation reactions. For con...
【简答题】I. Choose the best answer to each of the fo l l o wing questions according to what is stated or implied in the text. 1. Why couldn ’ t the Olympic metaphor be ap pl i ed to world t rade? A. Because wo...