What does the author think of the debate concerning the relationship between the media and violence?

A．More studies should be conducted before conclusions are draw

B．It should come to an end since the matter has now been settle

C．The past studies in this field have proved to be misleadin

D．He more than agrees with the views held by the alarmist

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1 Questionsare based on the following passage.
A new high-performance contact lens under development at the department for applied physics at the University of Heidelberg will not only correct ordinary vision defects but will enhance normal night vision as much as five times, making people’s vision sharper than that of cats.
Bille and his team work with an optical instrument called an active mirror—a device used in astronomical telescopes to spot newly emerging stars and far distant galaxies. Connected to a wave-front sensor that tracks and measures the course of a laser beam into the eye and back, the aluminum mirror detects the deficiencies of the cornea, the transparent protective layer covering the lens of the human eye. The highly precise data from the two instruments—which, Bille hopes, will one day be found at the opticians （眼镜商） all over the world—serve as a basis for the production of completely individualized contact lenses that correct and enhance the wearer’s vision.
By day, Bille’s contact lenses will focus rays of light so accurately on the retina （视网膜）that the image of a small leaf or the outline of a far distant tree will be formed with a sharpness that surpasses that of conventional vision aids by almost half a diopter （屈光度）. At night, the lenses have an even greater potential. “Because the new lens—in contrast to the already existing ones—also works when it’s dark and the pupil is wide open,” says Bille, “lens wearers will be able to identify a face at a distance of 100 meters”—80 meters farther than they would normally be able to see. In his experiments night vision was enhanced by an eve

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2 What do the two instruments mentioned in the second paragraph （Line 5） refer to?

A．The astronomical telescope and the wave-front senso

B．The aluminum mirror and the laser bea

C．The active mirror and the contact len

D．The aluminum mirror and the wave-front senso

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3 It has been found that vitamin E ________.

A．should be taken by patients regularly and persistently

B．can effectively reduce the recurrence of heart disease

C．has a preventive but not curative effect on heart disease

D．should be given to patients with heart disease as early as possible

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