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【简答题】
已知椭圆 x 2 a 2 + y 2 b 2 =1 （a＞b＞0）的两准线间距离为6，离心率 e= 3 3 ．过椭圆上任意一点P，作右准线的垂线PH（H为垂足），并延长PH到Q，使得 PH =λ HQ (λ＞0) ．F 2 为该椭圆的右焦点，设点P的坐标为（x 0 ，y 0 ）． （1）求椭圆方程； （2）当点P在椭圆上运动时，求λ的值使得点Q的轨迹是一个．
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皮皮学刷刷变学霸
举一反三
【单选题】Why did the farmer insist on giving the doctor one pound?
A.
He was thankful that the doctor cured him.
B.
The doctor never accepted money from a poor patient.
C.
The doctor thought it unfair to accept the money since he had done nothing.
D.
He insisted that it was his second visit to the doctor.
【单选题】Why are the farmer very happy in autumn?
A.
The good harvest
B.
The flowers.
C.
The interesting sports.
D.
The seafood.
【单选题】关于心的位置的描述,正确的是:
A.
位于胸腔后纵隔下部
B.
前方对胸骨体,后方平对 6~9 胸椎
C.
后方与食管、胸主动脉和迷走神经相邻
D.
约 2/3 在正中线右侧
E.
两侧直接与肺相贴
【简答题】Why did the farmer decide to see a doctor in the nearest town? Because his own doctor failed to ______ him.
【单选题】Why was the doctor surprised when the farmer said 'Here Fm again'?
A.
He did not expect that the farmer would come.
B.
He had never seen the farmer before.
C.
He seldom had patients from the countryside.
D.
Tile farmer was seriously ill.
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