题目

The attitudes of scientists   61    this rise are completely different. On the one hand, Dr Foster thinks that any trend in   62   the temperature increases by 5 degrees would lead to a catastrophe . Others who   63  with her think there may  be a rise of several meters in the sea level , or predict some severe storms, floods droughts ,famines, the spread of diseases and the   64     （disappear）of species .On the   65     hand ,there are those ,like Gorge  Hambley, who are  66    (oppose)to this view and predict that any warming will be    67   �15．已知椭圆C的中心在坐标原点，左焦点为F1，右焦点为F2（1，0），A、B是椭圆C的左、右顶点，D是椭圆C上异于 A、B的动点，且△AD B面积的最大值为2$\sqrt{3}$．（Ⅰ）求椭圆C的方程；（Ⅱ）若线段PQ是椭圆过点F2的弦，且$\overrightarrow{P{F_2}}=λ\overrightarrow{{F_2}Q}$，求△PF1Q内切圆面积最大时实数λ的值．