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．

下列是显微镜目镜和物镜的组合，在视野中看到最少细胞的是（    ）

①带有自然现象的：____、____

②AABC式的：____、____

③带有数字的：____、____

④带有反义词的：____、____

⑤写出三个从寓言故事中学到的成语。____、____、____

某企业为了监控产品质量，从产品流转均匀的生产线上每间隔10分钟抽取一个样本进行检测，这种抽样方法是（   ）

    To meet the global climate crisis that is approaching, big lifestyle changes are required of those of us. The good news is that our way of life can remain meaningful and worthy as our consumption becomes sustainable(可持续发展的).

    ____ Eat less meat and move toward a plant-based diet. This is one of the most effective things we can do because the food we now produce and consume is destroying the very ecosystems that we depend upon for survival. Here are some of the grim facts.

    The U. S. uses about one-half of its land for agriculture.____For example, the U. S. uses over 90 million acres of good agricultural land to produce corn, which is mostly fed to livestock(家畜).

    With 7.6 billion people on earth, the demand for food is enormous and constantly on the rise. It's easy to feel we can't make a difference____We should not ignore the power of the choices we make.

    Even one person can make a big difference by eating less meat and moving toward a plant-based diet and make contributions to the health of the planet as well as your own. Recognize how the food we eat is connected to other living beings. It often helps us make much wiser buying choices.____This way, we will help people around the world enjoy more eco-friendly and nutritious foods.

    ____When you change your diet to be more sustainable, you become visible proof that changing our food habits is doable, healthy, and enjoyable.

A. Little things matter in your relationship with the earth.

B. By buying mindfully, we support local, affordable agriculture.

C. But we can change our diet to heal the earth as we heal ourselves.

D. Unfortunately, the majority is used to raise livestock or for crops consumed by them.

E. Your choices create positive impacts on the food system and inspire the people around you.

F. There's one step you can take right away to reduce harm to Mother Earth.

G. We can try to reduce waste by using leftovers and eating the fresh produce we buy.