已知椭圆C:$\frac{x^2}{a^2}$+$\frac{y^2}{b^2}$=1与双曲线$\frac{x^2}{4-y}+\frac{y^2}{1-y}=1\left(1<y<4\right)$有公共焦点，过椭圆C的右顶点B任意作直线l，设直线l交抛物线y²=2x于P、Q两点，且OP⊥OQ．

（Ⅰ）求椭圆C的方程；

（Ⅱ）在椭圆C上，是否存在点R（m，n）使得直线l：mx+ny=1与圆O：x²+y²=1相交于不同的两点M、N，且△OMN的面积最大？若存在，求出点R的坐标及对应的△OMN的面积；若不存在，请说明理由．

有关下列四幅图的说法正确的是（   ）

某企业今年第一季度各月份产值占这个季度总产值的百分比如图所示，又知二月份产值是72万元，那么该企业第一季度月产值的平均数是____万元．

阅读下列文段, 找出与文段相匹配的图片, 将文段的字母编号写在相应的括号内。

A. Which do you want? Delicious fruit and vegetables, or small colorful clothes? Both maybe. It would be cool to combine(结合) the two. A designer from the US makes it happen. The designer draws some sketches(素描) of girls on paper. Then, she uses fruit and vegetables to make shirts, pants and skirts.

B. Winnie the Pooh is a small yellow Teddy Bear. The first book about him came out in l926. He is 90 years old now. Can you believe that? Winnie lives in a big forest with his friends. They like to go on fun adventures(探险).

C. The rocks look like lovely faces. Aaron and his family put 500 rocks in a museum for people to see. But what about the other 500? The family hide them all over the city. Now parents and children in the city enjoy going out to find the little rocks.