题干

假说——演绎法是现代科学研究中常用的方法,包括“提出问题、作出假设、演绎推理、检验推理、得出结论”五个基本环节。利用该方法,孟德尔发现了两个遗传规律。下列关于孟德尔的研究过程的分析错误的是(  )

A:提出问题是建立在豌豆纯合亲本杂交和F1自交遗传实验基础上的

B:孟德尔所作假设的核心内容是“性状是由位于染色体上的基因控制的”

C:为了验证所作出的假设是否正确,孟德尔设计并完成了测交实验

D:孟德尔发现的两大遗传定律使用的范围是有性生殖的真核生物

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B

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    Death of science icon(巨匠)

    In modern history, there has perhaps never been a scientist as well-known as Stephen Hawking. Whether he was educating the world with his knowledge of the universe(宇宙), or making fun of himself in TV shows like The Simpsons, it's hard to imagine what the world will be like but now Hawking is no longer in it.

    On March 14, the British physicist passed away at his home in Cambridge, England. Since then, many people have expressed their sadness in public, including British computer scientist Tim Berners-Lee, who invented the World Wide Web. “We have lost a great mind and a wonderful spirit,” Berners-Lee wrote.

    Hawking was an icon for many reasons, but he will be best remembered for his work in the field of science. Building on German scientist Albert Einstein's work, Hawking explained his belief that space started with the Big Bang, and will end with Black Holes. This idea kicked off a series of scientific studies including into the origin of the universe itself.

    Besides his work in science, he also managed to overcome many difficulties in his personal life. While studying at Cambridge University, he got a serious illness at the age of 21. His illness left him disabled and he was told he only had a short time to live. However, as we all know, he went on to become one of the greatest minds that the world has ever known.

    Hawking leaves behind a great legacy(遗产). His book A Brief History of Time: From the Big Bang to Black Holes that came out in 1988, became one of the world's best-sellers. He may no longer be with us, but Hawking will continue to inspire the world for generations to come. As he once said himself, “Look up at the stars and not down at your feet.”

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