B. People cannot see them unless traveling toAlaska or Canada
C. They are very close to the ground.
D. They are very long and thick.
35. What is the authors tone toward the Northern Lights?
A. Indifferent
B. Sarcastic
C. Sharp
D. Appreciative
第二篇Eye-tracker Lots You Drag and Drop Files with a Glance
Bored of using a mouse? Soon youll be ableto change stuff on your computer screen and then moveit directly onto your smartphone or tablet(平板电脑) with nothing more than a glance.
A system called EyeDrop uses a head-mountedeye tracker that simultaneously records your field of view so it knows whereyou are looking on the screen. Gazing at an object aphoto, say and then pressing a key, selects thatobject. It can then be moved from the screen to a tablet or smartphone just byglancing at the second device, as long as the two are connected wirelessly.
The beauty of using gaze to supportthis is that our eyes naturally focus on content that we want to acquire,says Jayson Turner, who developed the system with colleagues at LancasterUniversity, UK.
Turner believes EyeDrop would be useful totransfer an interactive map or contact information from a public display toyour smartphone or for sharing photos.
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