题目

实验室常用下列装置来制取气体： (1)写出图中有标号仪器的名称：③                 。 (2)写出实验室用A装置制取氧气的一个化学方程式：                             。 (3)实验室制得的CO2气体中常含有少量HCl气体和水蒸气。为了制得纯净、干燥的CO2气体，可使用F、G装置除去HCl气体和水蒸气，则除杂装置的导管接口按气流方向连接顺序是：B接（  ）（  ）接（  ）（  ）接D（填导管接口小写字母标号）。利用G装置除去HClIn 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. For more articles on modern science，please CLICK here． 1.Which of the following is the main idea of the passage? A. An introduction of eye-controlling technology B. An introduction of a new device. C. An introduction of smart-phones D. An introduction of a new technology for the disabled. 2.The underlined word “gimmick” probably means ___________. A. a way                           B. a trick                          C. a lie                             D. a dream 3.According to the passage, we can learn that ___________. A. the eye-controlling technology was first developed for the blind B. the present developing of the technology will bring no good C. the eye-controlling technology is only intended for the disabled people D. there is no such a phone as we can use only with our eyes at present 4.This passage is probably taken from ___________. A. an experiment report                               B. a science fiction C. a science website                                     D. a school textbook