Why is X-rays treatment called “radiotherapy”?
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1 .Ronald Reagan has to suffer permanent injury of hearing because some of the delicate hairs in his inner ear _______.
A we wear contact lenses earlier B people will have worse hearing C keep us from suffering more noises D the ears to recover E have suffered a great damage F his nerve system is inefficient
2 .Scientists think that by the year 2000, _____.
A we wear contact lenses earlier B people will have worse hearing C keep us from suffering more noises D the ears to recover E have suffered a great damage F his nerve system is inefficient
3 .We can keep our hearing health if ___________.
A we wear contact lenses earlier B people will have worse hearing C keep us from suffering more noises D the ears to recover E have suffered a great damage F his nerve system is inefficient
4 .Which of the following statements is nearest in meaning to the sentence "To sleep. Perchance to file?”?
A Does brain arrange memories in useful order during sleep? B Does brain have memories when one is sleeping? C Does brain remember files after one falls asleep? D Does brain work on files in sleep?
5 .According to the last paragraph, what is the ultimate reason for going to the gym?
A To prevent hippocampus shrinkage B To control weight C To exercise D To control glucose levels
7 .Why is X-rays called Roentgen rays?
A Because X means the unknown. B Because Roentgen was a very famous physicist. C Because Roentgen sounds very good. D Because Roentgen discovered X-rays.
8 .The word “by accident” (Para. 2) can be best replaced by ________.
A by design B by chance C on purpose D deliberately
9 .Why Roentgen named the new rays produced from the tube as X-rays?
A Because the letter X is special. B Because others give the name. C Because the letter X is the name of this ray itself. D Because the letter X stands for the unknown.
10 .What is the main idea of the passage?
A Roentgen discovered X-rays. B The usage of X-rays C An experiment made by Roentgen D The discovery of X-rays and its medical usage
