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单项选择题

In a telephone survey of more than 2000 adults, 21% said they believed the sun revolved(旋转)around the earth. An【C1】______7% did not know which revolved around【C2】______. I have no doubt that【C3】______all of these people were【C4】______in school that the earth revolves around the sun; 【C5】______may even have written it【C6】______a test. But they never【C7】______their incorrect mental models of planetary(行星的) 【C8】______because their everyday observations didn’t support【C9】______their teachers told them: People see the sun "moving"【C10】______the sky as morning turns to night, and the earth seems stationary(静止的) 【C11】______that is happening. Students can learn the right answers【C12】______heart in class, and yet never combined them 【C13】______their working models of the world. The objectively correct answer the professor accepts and the【C14】______personal understanding of the world can【C15】______side by side, each unaffected by the other. Outside of class, the student continues to use the【C16】______model because it has always worked well【C17】______that circumstance. Unless professors address【C18】______errors in students’ personal models of the world, students are not【C19】______to replace them with the【C20】______one.

【C20】
A．reasonable
B．correct
C．better
D．perfect
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