2. 外语
  3. Art can be made of almost anything, including substances 【M1】_______ that have not been produced and used in ages, a

Art can be made of almost anything, including substances 【M1】_______ that have not been produced and used in ages, a

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问题     Art can be made of almost anything, including substances             【M1】_______
that have not been produced and used in ages, and it comes in all shapes and sizes.
More importantly, scientists have to study art without affecting it,     【M2】_______
and that usually means limited, destructive tests.                       【M3】_______
If they have to take a sample, it must be as small as possible.
In the objects conservation lab, the big samples look as
the period at the end of this sentence.                                  【M4】_______
Small samples are microscopic. The scientists have developed
creative ways to deal the constraints. Consider the case of the fish pendant.【M5】_______
Gold with multicolored enamel,
it was originally thought to date in the 16th century.                   【M6】_______
And curators and conservators saw that the style was all wrong for that period.【M7】_______
It was either mislabeled or a pretence.
Mark Wypyski, a glass specialist who runs                                【M8】_______
the scanning electron microscope at the museum, took a tiny porcelainlike sample
from a green part of the pendant and bombarded it with electrons, causing it
to emit X-rays characteristic of the elements in it. Mr. Wypyski interpreted
the results as they popped on a computer monitor.                        【M9】_______
There was chromium, which was not used in
glass or enamels since the 19th century.                                 【M10】_______
【M7】
选项
答案And改成But
解析 逻辑关系。由上下文判断，这里指的是“本来认定为……”，但发现事实并不是这样，因此应当使用转折连词。
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