问题
填空题
椭圆
|
答案
|P1F|=a-c=1,|PnF|=a+c=3,
|PnF|=|P1F|+(n-1)d,
若d=
,则n=201,1 100
∵d>
,∴n<201.1 100
∴n的最大值为200.
答案:200.
椭圆
|
|P1F|=a-c=1,|PnF|=a+c=3,
|PnF|=|P1F|+(n-1)d,
若d=
,则n=201,1 100
∵d>
,∴n<201.1 100
∴n的最大值为200.
答案:200.
Passage Three
The subject discussed in the passage mainly belongs to the realm of ______.
A.psychological biology
B.developmental psychology
C.biological psychology
D.evolutional physiology