【单选题】长期使用氢氯噻嗪的降压机制主要是
E.
减少小动脉壁细胞 NA + ,进而使 Ca 2+ 交换进入细胞内含量降低
【简答题】已知点F(1,0),直线l:x=-1,点P为平面上的动点,过点P作直线l的垂线,垂足为点Q,且 QP ? FQ = PF ? FQ ,则动点P的轨迹C的方程是______.
【单选题】What is implied when Cynthia Strickland said 'If you dress a certain way, you behave a certain way'?
A.
One's performance is judged by one's dress.
B.
One who dresses well performs well.
C.
One's dress may influence one's behaviour.
D.
One should dress in an appropriate way.
【多选题】人们常用“三湘四水”泛指湖南全境,其中“四水”是指( )
【简答题】氢氯噻嗪的降压机制是早期与_有关,长期与_有关
【简答题】如图,已知△OFQ的面积为S,且 OF ? FQ =1 . (Ⅰ)若 1 2 <S< 3 2 ,求 < OF , FQ > 的范围; (Ⅱ)设 | OF |=c(c≥2),S= 3 4 c. 若以O为中心,F为一个焦点的椭圆经过点Q,以c为变量,当 | OQ | 取最小值时,求椭圆的方程.