大全1－12，未见有人讨论

大全1－12

Using computer techniques, researchers analyze layers of paint that lie buried beneath the surface layers of old paintings. They claim, for example, that additional mountainous scenery once appeared in Leonardo da Vinci’s Mona Lisa, which was later painted over. Skeptics reply to these claims, however, that X-ray examinations of the Mona Lisa do not show hidden mountains.

Which of the following, if true, would tend most to weaken the force of the skeptics’ objections?

(A) There is no written or anecdotal record that Leonardo da Vinci ever painted over major areas of his Mona Lisa.

(B) Painters of da Vinci’s time commonly created images of mountainous scenery in the backgrounds of portraits like the Mona Lisa.

(C) No one knows for certain what parts of the Mona Lisa may have been painted by da Vinci’s assistants rather than by da Vinci himself.

(D) Infrared photography of the Mona Lisa has revealed no trace of hidden mountainous scenery.（E）

(E) Analysis relying on X-rays only has the capacity to detect lead-based white pigments in layers of paint beneath a painting’s surface layers.

不明白

E吧

说明这个X光的检测并不正确，怀疑者没有理由去怀疑

表层在底层之上，电脑技术说，那个山是后来画上去的

怀疑者说，X光没有发现隐藏的山，但是X光没发现不代表不存在

如果底层上的山和表层上的山重合，X光是没有用的，只要表层有，底层的影像会被表层遮盖，从而发现不了。