题目

2017年诺贝尔化学奖被瑞典、美国和英国三位化学家获得：表彰他们“将低温电子显微镜技术用于溶液中生物分子结构的高分辨率测定”。结合以上信息，下列说法错误的是（ ） A . 化学家已经可以在微观层面上操纵分子、认识分子和制造分子 B . 化学与生物学关系密切，化学研究技术促进了生物学发展 C . 现在很多新技术已成为化学研究的重要手段 D . 化学属于实验科学，分子微观结构的研究不是主流，不需要投入过多精力Teddy' s BearThe story of how the teddy bear was invented is an interesting one. In 1902, American president （总统），Theodore (Teddy) Roosevelt was hunting (打猎) in the forest several of his friends. Almost everyone had successfully shot an animal, but the president not. Nobody wanted to make the president look , so they tied an American black bear to a . They wanted the president to shoot .The president was very surprised to see the bear tied to a tree. He felt it was to shoot the bear, because it couldn't run away. He to shoot it, and the story of his decision went all over the country. was moved by the president's beliefs (信念). There was a cartoon showing the president refusing to shoot a cute bear.It was this cartoon and the story behind the president's hunting trip that gave Morris an idea to make a new . He made a small, soft bear and it in his shop window. Next to the bear he made a sign that read, "Teddy's Bear". The new toy was a big success and it Morris with the money to create a toy company.Teddy bears have been since they were first made. A teddy bear would be the first choice people think about children's toys. Theodore Roosevelt's famous on a hunting trip in 1902 brought millions of soft, stuffed bears. They are being loved by people across the world.1.A. for B. with C. by D. without2.A. did B. should C. would D. was3.A. sad B. happy C. friendly D. fine4.A. wall B. chair C. rock D. tree5.A. it B. him C. them D. her6.A. difficult B. unfair C. dangerous D. exciting7.A. wanted B. decided C. refused D. went8.A. Everybody B. Nobody C. Both D. Neither9.A. only B. hardly C. even D. still10.A. company B. toy C. shop D. present11.A. collected B. showed C. found D. hid12.A. gave B. filled C. met D. provided13.A. colorful B. expensive C. popular D. boring14.A. since B. when C. until D. unless15.A. decision B. speech C. sign D. skill