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[单项选择] 第二篇 Diabetes(糖屎病)and Eye Damage
0vet 2 million Canadians have diabetes．It is the leading cause of blindness in North Americans under 65 years of age Diabetes is a condition where the body either cannot produce enough insulin(胰岛素)or cannot respond properly to insulin．Insulin is important because it moves glucose(葡萄糖)，a simple sugar．into the body’S cells from the blood．The food people eat provides the body with glucose，which is used by the cells as a source of energy．If insulin isn’t available or doesn’t work correctly to move glucose from the blood into the cells，glucose will stay in the blood，leading to high blood sugar levels．
High blood sugar levels damage the blood vessels，including the tiny blood vessels in the eye．This leads to an eye disease known as diabetic retinopathy(糖尿病型视网膜病)．The retina (视网膜)is an area at the back of the eye that changes light into nerve signals．With diabetic retinopathy，some blood vessels in the retina are lost，and some of the other b
A. "the nerve’s
B. "the blood’s
C. "the eye’s
D. "the retina’s
[单项选择]第二篇
Eye-tracker Lots You Drag and Drop Files with a Glance
Bored of using a mouse Soon you’ll be able to change stuff on your computer screen – and then move it directly onto your smartphone or tablet(平板电脑) –with nothing more than a glance.
A system called EyeDrop uses a head-mounted eye tracker that simultaneously records your field of view so it knows where you are looking on the screen. Gazing at an object – a photo, say – and then pressing a key, selects that object. It can then be moved from the screen to a tablet or smartphone just by glancing at the second device, as long as the two are connected wirelessly.
"The beauty of using gaze to support this is that our eyes naturally focus on content that we want to acquire," says Jayson Turner, who developed the system with colleagues at Lancaster University, UK.
Turner believes EyeDrop would be useful to transfer an interactive map or contact information from a public
A. change our computer screen.
B. focus on anything that interests us.
C. get a smartphone connected wirelessly.
D. move an object from screen with a glance.
[单项选择]第二篇
Mind-reading Machine
A team of researchers in California has developed a way to predict what kinds of objects people are looking at by scanning (扫描) what’s happening in their brains.
When you look at something, your eyes send a signal about that object to your brain. Different regions of the brain process the information your eyes send. Cells in your brain called neurons (神经元) are responsible for this processing.
The fMRI (functional Magnetic Resonance Imaging) (功能性磁振造影) brain scans could generally match electrical activity in the brain to the basic shape of a picture that someone was looking at.
Like cells anywhere else in your body, active neurons use oxygen. Blood brings oxygen to the neurons, and the more active a neuron is, the more oxygen it will consume. The more active a region of the brain, the more active its neurons, and in turn, the more blood will travel to that region. And by using fMRI, scientist
A. The magnetic system in the brain.
B. The central part of the heart.
C. Oxygen-rich blood.
D. Neurons in the brain.
