今年国家实施“全面二孩”政策，对改善人口发展战略，应对人口老龄化起到积极作用，优生优育再次成为众多家庭关注的话题．

“皮革奶”是指添加过“皮革水解蛋白”的乳制品。“皮革水解蛋白”是由皮革的下脚料甚至是动物的毛发等物质经过水解生成的一种粉状物。这种粉状物蛋白质含量相对较高,添加至乳制品中可以增加其蛋白含量。但其中含有重铬酸钾和重铬酸钠等有毒物质,人体吸收后可致关节疏松、肿大,甚至造成儿童死亡。下列有关蛋白质的叙述,正确的是(    )

下列表述中，不属于古罗马建筑特点的是(      )

增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线，并在该词下面写出修改后的词。

注意：1）每处错误及其修改均仅限一词；

2）只允许修改10处，多者（从第11处起）不计分。

    It is well known that one of the aims of UNESCO is to protect and preserve culture and natural heritage. Our heritage is the precious gift from the past, and it is also what we live with today. I believed some of you may have visited Mount Tai and Mount Huang, or have been to Jiuzhaigou. Many people just find unbelievable that so beautiful places exist in this world.

    These heritage site impress visitors with their amazed beauty, and they are a great source of inspiration. There are altogether more than over 900 World Heritage sites. People have come to understanding the truth that they do not belong to any single person, and to all mankind.