单项选择题

In recent years, backpacks have begun sporting outside pockets that are, not coincidentally, the perfect size for an iPod. Handbags routinely feature cell-phone compartments. And now, from practical to modem, the fashion industry is taking a cue from these gadgets, integrating their technologies into the fabrics rather than merely providing storage for them.
From where do fashion designers get the idea of integrating technology into fabrics according to the passage

A. The outside pockets for iPods on backpacks.
B. The cell-phone compartments on handbags.
C. Costumes from science, fictional thrillers.
D. The small gadgets of modem technologies.
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Spindler’s team fed three mice a normal diet for their whole lives, and fed another three on half-rations. Three more mice were switched from the normal diet to half-feed for a month when they were 34 months old-equivalent to about 70 human years. The researchers checked the activity of 11,000 genes from the mouse livers,and found that 46 changed with age in the normally fed mice. The changes were associated with things like inflammation and free production-probably bad news for mouse health. In the mice that had dieted all their lives, 27 of those 46 genes continued to behave like young genes. But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 per cent of these gene changes. The researchers found that ______ genes changed with age in the mice that had dieted all their lives.
A. 46
B. 27
C. 19
D. 32
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For example, those that had learned the maze six weeks after the injection had three times as much activity in their stained cells as those mice that learned the maze eight weeks after injection, when the stained cells were fully mature. Cells examined at less than six weeks’ old at the time of learning did not show as much activity as at six weeks, however. According to Frankland, this suggests that when neurons reach six weeks of age they are specifically recruited to form the brain networks that support new memories. According to Fankland, the example shows that neurons in mice’s brains are specially recmited When
A. they are six weeks old.
B. they are eight weeks old.
C. they are between six and eight weeks old.
D. they are less than six weeks ol
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