问题 单项选择题 A3/A4型题

CR系统用成像板(IP)来接收X线的模拟信息,然后经过模/数转换来实现影像的数字化。对IP的曝光过程就是信息采集。

关于IP的叙述错误的是()

A.IP作为辐射接收部件替代了常规X线摄影用的胶片

B.IP在X线下受到第一次激发时储存连续的模拟信息

C.IP被扫描后所获得的信息可以同时进行存储和打印

D.曝光后的成像板,由于吸收X线而发生电化学反应

E.IP的影像数据可通过施加强光照射来消除

答案

参考答案:D

阅读理解

In the near future,we may be using our eyes to operate our smart-phones and tablets,even when it comes to playing popular games like Fruit Ninja.

The Gaze Group has been developing eye-controlled computer technology for nearly 20 years.But those devices have been firstly designed to help those with disabilities,and are very expensive.

“After a while,we figured out that probably the best way is to go for a mass-market way,” says Gaze’s Sune Alstrup Johansen.“where everybody would have this available."

Johansen and some of his colleagues have formed a new company,the Eye Tribe,which is hoping to develop the technology on a mass commercial level.

The technology works with the help of the computing device toward the user’s face. After making sure of the user’s eye movements,the technology is then able to easily find where a person’s eyes are moving,and then allow the eyes to control a cursor(光标).

“Our software can then determine the location of the eyes and know where you’re looking on the screen to make sure what you’re looking at,“reads an explanation on the Eye Tribe site.

There has been a gradual change toward hands-free technology in recent years, particularly in the gaming world.Recently Xbox released the Kinect device,which lets users control their Xbox and play certain games using only their hands,legs and voices. But still,most of these devices have been more of a gimmick than a practical way to use one’s hands to control a mobile device.Johansen said a replaceable filter(滤光器)would be a cheap,convenient way for most consumers.

And even as companies like The Eye Tribe work to create such a product for the average user, making the eye-controlled technology more accessible and less expensive will have similar benefits for physically disabled users.

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小题1:Which of the following is the main idea of the passage?

A.An introduction of a new device.

B.An introduction of smart-phones.

C.An introduction of eye-controlling technology.

D.An introduction of a new technology for the disabled.小题2:The underlined word“gimmick” probably means         .

A.a trick

B.a way

C.a lie

D.a dream小题3:According to the passage,we can learn that      .

A.the eye-controlling technology was first developed for the blind

B.the present developing 0f the technology will bring no good

C.there is no such a phone as we can use only with our eyes at present

D.the eye-controlling technology is only intended for the disabled people小题4:This passage is probably taken from         .

A.an experiment report

B.a science fiction

C.a school textbook

D.a science website

单项选择题