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Laura: little articles of it, they"re ornaments mostly! Most of them are little animals made out of glass, the tiniest little animals in the world.[...]Oh, be careful—if you breathe, it breaks!Jim: I"d better no take it. I"m pretty clumsy with things.Laura; Go on, I trust you with him![She places the piece in his palm.]There now—you"re holding him gently! Hold him over the light, he loves the light! You see how the light shines through him Jim; it sure does shine!Laura; I shouldn"t be partial, but he is my favorite one. Jim; What kind of a thing is this one supposed to be Laura; Haven"t you noticed the single horn on his forehead Jim; A unicorn, huh Laura; Mmmm-hmmm!Jim; Unicorns—aren"t they extinct in the modern world Laura; I know!Jim; Poor little fellow, he must feel sort of lonesome. Laura; Well, if he does, he doesn"t complain about it. He stays on a shelf with some horses that hasn"t have horns and all or them seem to get along nicely together. What is the theme of the work

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某学者在某地进行吸烟与肺癌关系的研究,结果显示,该地人群肺癌年死亡率为0.56%0,吸烟与不吸烟者的肺癌年死亡率为0.96‰和0.07‰。

A. 92.7%
B. 0.07
C. 13.71
D. 0.71
E. 8.00

But all this part of it seemed remote and unessential. I[Nick]found myself on Gatsby"s side, and alone. From the moment I telephoned news of the catastrophe to West Egg Village, every surmise about him, and every practical question, was referred to me. Identify the author and the work from which the passage is selected.

WH0提出的机体对于致癌物的反应不包括( )。

A. 试验组发生对照组没有的肿瘤类型
B. 试验组一种或多种肿瘤的发生率明显高于对照组
C. 试验组每个动物的平均肿瘤数明显多于对照组
D. 试验组发生肿瘤的组织器官功能明显低于对照组
E. 试验组肿瘤的发生时间早于对照组

1945年找出某厂的l000名在表上涂镭的女工,比较这些女工与1000名女电话接线员自1945~1975年骨瘤发生率。在此期间,涂镭女工有20例骨瘤患者,而接线员只有4例 这种研究属于( )。

A. 队列研究
B. 实验研究
C. 病例对照研究
D. 临床实验研究
E. 干预性实验研究

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