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阅读理解：
"Geochemists just want an intuitive sense of what's going on with the elements,"says Albert Galy from the University of Cambridge ________.
A.An earth scientist has rejigged the periodic table（元素周期表)to make chemistry simpler to teach to students.
B.The traditional periodic table was well drawn.
C."I imagine contour lines would be good for undergraduates."
D.But he has added contour lines to charge density,helping to explain which ions react with which.
正确答案：C
答案解析：这一段是剑桥大学的Albert Galy的原话，我们可以从引导整个关键点得出答案。即："地学化学家们只想通过直觉判断元素的活动。我想等高线对学生们有好处"。
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