鼠标器(MOUSE)属于（　）

A:输出设备 B:输入设备 C:存储器设备 D:显示设备

Eat to Live

    A meager diet may give you health and long life, but it"s not much fun—and it might not even be necessary. We may be able to hang on to¹ most of that youthful vigor even if we don"t start to diet until old age.
    Stephen Spindler and his colleagues from the UniversityofCaliforniaatRiversidehave found that some of an elderly mouse"s liver genes can be made t006F behave as they did when the mouse was young simply by limiting its food for four weeks. The genetic rejuvenation won"t reverse other damage caused by time for the mouse, but could help its liver metabolize drugs or get rid of toxins².
    Spindler"s team fed three mice a normal diet for their whole lives, and fed another three on half-rations³. Three more mice were switched from the normal diet to half-feed³ 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 radical production⁴—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.
　　“This is the first indication that thee effects kick in⁵ pretty quickly,” says Huber Warner from the National Institute on Aging near Washington, D. C.
　　No one yet knows if calorie works in people as it does in mice, bus Spindler is hopeful. “There"s attracting and tempting evidence out there that it will work,” he says.
　　If it does work in people, there might be good reasons for rejuvenating the liver. As we get older, out bodies are les efficient at metabolizing drugs, for example. A brief period of time of dieting, says Spindler, could be enough to make sure a drug is effective.
　　But Spindler isn"t sure the trade-off is worth it⁶. “The mice get less disease, they live longer but they"re hungry,” he says. “Even seeing what a diet does, it"s still hard to go to a restaurant and say: "I can only eat half of that".”
　　Spindler hopes we soon won"t need to diet at all. His company, Life Span Genetics inCalifornia, is looking for drugs that have the effects of calorie restriction.

词汇：
meager/"mi:gə(r)/adj.不足的 

youthful/ ˈju:θfl/adj.   有青春活力的
vigor/ "vɪgə(r)/n. 精力，活力 

metabolize / mə"tæbəlaɪz/vt.  使(一种物质)进入新陈代谢过程
genetic / dʒəˈnetɪk/adj.  基因的 

rejuvenation  n. 恢复活力，返老还童
liver/ ˈlɪvə(r)/n.  肝脏  

toxin/ ˈtɒksɪn/ n.  毒素 

ration/ "ræʃn/ n.   定量
calorie / "kælərɪ/n.  卡 (热量的单位) 

inflammation / ˌɪnfləˈmeɪʃn/n. 炎症，发炎
trade-off   n.交换，交易

rejuvenate/ rɪ"dʒu:vəneɪt/ vt. 使恢复活力

Why does the author mention an elderly mouse in paragraph 2?

A:To describe the influence of old age on mice B:To illustrate the effect of meager food on mice C:To tell us how mice’s liver genes behave D:To inform us of the process of metabolizing drugs

maya hair是指哪个模块（）

A:建模 B:贴图 C:动作 D:毛发

鼠标(MOUSE)是( )。

A:输出设备 B:输入设备 C:存储器设备 D:显示设备

鼠标器(MOUSE)是（ ）。

A:输出设备 B:输入设备 C:存储器设备 D:显示设备

鼠标器（MOUSE）属于________。

A:输出设备 B:输入设备 C:存储器设备 D:显示设备

The average modified mouse lived

A:3 years. B:753 days. C:More than 3 years. D:887 days.