Once, in a small village, lived a family with eight children. Two of the children loved1very much, but the family was so poor that2was impossible to send them to study at the art college at the same time. After many discussions, the two boys finally3a plan. They would throw a coin. The loser would4down into the coal mines (煤矿) and used the money that he would make in the mines to support his brother5at the college. Then, when the brother who won finished his studies, after four years, he would support6brother studying at the college.

    James won and Jack went down into the mines. James studied with all his heart and his paintings were much better than7of most of his teachers, and by the time he graduated, he was beginning8a lot of money for his paintings.

    9James returned, the family held a big dinner for his great success. Soon after the meal began, James 10up from his seat to drink a toast(敬酒) to his dear11 He said, "Jack, now you can go to the art college and your dream 12true. I will take care of you."

    But Jack said13 "Brother, the four years in the mines has done too much to my hands, so it's too late. Now I can't even hold a glass. "

    To show his great love and respect, James drew his brother's hands 14fingers towards the sky.

    He called his drawing "The Praying Hands", 15 became very famous years later.

美国当地时间2016年2月11日上午10点30分，美国国家科学基金会（NSF）在华盛顿特区国家媒体中心宣布：人类首次直接探测到了引力波。引力波像其它的波一样，携带着能量和信息，能够让我们回望宇宙大爆炸最初瞬间，检验宇宙大爆炸理论的正确与否。这说明（  ）

①思维与存在具有同一性             

②人们可利用客观规律为人类造福

③辩证否定的实质是扬弃             

④发展就是事物自身的运动和变化

资料1：科学家们在研究中发现，将苏丹红一号染料直接注射入小鼠膀胱后（小鼠正常体细胞有22对染色体），膀胱被诱发产生了癌症．

资料2：从小鼠膀胱癌细胞中分离导致细胞癌变的ras基因，将其与正常细胞相应的DNA片段比较，癌变的ras基因有一个碱基对发生了变化，使原癌基因控制编码第12个氨基酸的密码子GCC（甘氨酸）变成了GUC（缬氨酸）．这种突变ras的肿瘤蛋白，能持续促进细胞增殖．