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B a light and warm room.
C a cold and quiet room.
D a dark and warm room.
33 According to the passage, if a person wants to fall asleep fast he shouldn’t
A eat anything during supper time.
B read any books before he goes to bed.
C watch television shortly before going to bed.
D drink anything that will keep him awake.
34 According to the passage, what is the worst aspect of insomnia?
A Watching too much television.
B Eating too much before going to bed.
C Worrying about sleeplessness.
D Reading too much at night.
35 According to the author, insomnia shouldn’t be a serious problem because
A its cause can be corrected by making oneself feel tired enough.
B doctors can cure it easily.
C some people can catch up on their sleep during the day.
D some people don’t need so much sleep.
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 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 are responsible for this processing.
The fMRI (functional Magnetic Resonance Imaging) 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, scientists can visualize which parts of the brain receive more oxygen-rich blood--and therefore, which parts are working to process information.
An fMRI machine is a device that scans the brain and measures changes in blood flow to the brain.
The technology shows researchers how brain activity changes when a person thinks, looks at something, or carries out an activity like speaking or reading. By highlighting the areas of the
brain at work when a person looks at different images, fMRI may help scientists determine specific patterns of brain activity associated with different kinds of images.
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