上海发展钢铁工业最大的优势是（    ）  

20世纪世界局势风云变幻，综合国力的竞争影响并改变着世界政治格局。阅读材料，回答问题。

材料一：1919年1月，美国总统威尔逊怀着处理战后事宜的计划登上了欧洲大陆，他希望能够主宰在巴黎召开的和平会议。然而，英法等战胜国拒绝了威尔逊的基本设想，美国试图构件战后国际秩序的努力无果而终……

1945年2月，美国的罗斯福、苏联的斯大林和英国的丘吉尔，在克里米亚半岛的雅尔塔商议战后事宜。一个新的世界格局出现了。

——《大国崛起·危局新政》

两次世界大战后分别诞生的国际组织名称。它们的建立，反映出世界人民的什么愿望？

材料二：世界已分为两个敌对的营垒，一边是“极权政体”，一边是“自由国家”，每个国家都面临着两种不同生活方式的抉择；美国要承担“自由世界”守护神的使命，充当世界宪兵的角色。

——1947年3月美国总统杜鲁门国会咨文

已知反应①：CO（g）+CuO（s）⇌CO₂（g）+Cu（s）和反应②：H₂（g）+CuO（s）⇌Cu（s）+H₂O（g）在相同的温度下的平衡常数分别为K₁和K₂，该温度下反应③：CO（g）+H₂O（g）⇌CO₂（g）+H₂（g）的平衡常数为K．则下列说法正确的是（　　）

两滴水银相互接近时能自动结合为一滴较大的水银滴，这一事实说明 （   ）

    Tom is a boy with physical____（disable）and he can't walk as ____normal boy. In order to offer him more convenience, his mother bought him a robot____ name is Jimmy yesterday. Jimmy accompanies Tom every day after his parents leave for work,____（take）care of him. Tom suffers from a rare disease. He can't stand up.  Instead, he has to sit on an armchair all the day. Jimmy shows sympathy to Tom and ____(try) his best to make him happy. Some days ago, he took Tom to the park. He tried to protect him from ____(harm). He gave Tom encouragement to have a try to walk. So Tom ____ But to Jimmy's disappointment, Tom fell on the ground, causing some other boys nearby to make fun ____ him. “Don't laugh at the disabled!” Jimmy turned around, warning those boys. They felt sorry and ran away immediately. The next day, Jimmy took Tom to the park once again. This time, Tom was ____ (adapt) to the circumstance and didn't feel clumsy any longer. He gets back his own confidence ____ he is still a disabled boy.