题目内容
阅读理解。
阅读下面短文,从每题所给四个选项中选出最佳答案。
X-rays were first discovered by a German scientist, Wulhelm Konrad Rontgen, in 185, almost by chance.
While he was experimenting with electric current through certain gases in a special glass tube, Rontgen happened to notice that, even when the tube was covered with black paper, some strange kind of radiation was coming through and making a screen nearby glow. Then he put the screen in the next room of a closed door. The screen was still glowing. The screen showed that the strange rays could not only pass through black paper but also wood.
Rontgen next put his hand between these unseen rays and a photographic plate, the rays would print a shadow of the bony framework of his hand on the plate.
In this way, Rontgen discovered such rays and made the first X-ray picture of a hand, showing just how the bones in the hand fit together. In his account of what he had discovered, Rontgen named these new rays X-rays, which was called by other scientists Rontgen rays.
1.The sentence “Rontgen discovered X-rays almost by chance” means ________.
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A.he was given a chance to discover them
B.he discovered X-rays unexpectedly
C.he devoted his life to the discovery of X-rays
D.he invented X-rays all by himself
2.Radiation is a kind of energy in the form of ________.
[ ]
3.Rontgen was the first man who ________.
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A.invented X-rays
B.printed a picture of the hand
C.used photographic plate
D.discovered X-rays and made used of it
4.What do you suppose Rontgen was according to the passage?
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A.He was an X-rays picture maker.
B.He was a chemist.
C.He was a physicist.
D.He was a doctor.
5.Which is the best title for this passage?
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A.The Discovery of X-rays.
B.The Use of X-rays.
C.Rontgen, the Great Scientist.
D.Discovery by Chance.