[单项选择]皮带的工作速度一般在（）秒之间。
A. 5～25米/秒
B. 25～30米/秒
C. 45～50米/秒

[判断题]如果旅游团乘飞机离境，地陪应该提醒或协助领队提前48小时确认机票。( )

[判断题]406
A.正确
B.错误

[不定项选择题]A.胃酸的分泌
A.胰岛B细胞
B.肝脏合成胆固醇
C.糖皮质激素的分泌
D.哮喘患者呼吸道阻力
E.清晨5时至中午11时最低，下午2时至次日凌晨1时最高，是

[简答题]试述散化船的类型可划分为哪些？

[单项选择]甲人民法院受理了一起民事诉讼案件，后发现该案件不属于本院的管辖范围，遂移送乙人民法院。乙人民法院受理后发现该案件也不属于其管辖范围，此时乙可采取的措施是( )。
A. 确认该案件有管辖权的人民法院后，再办理移交手续
B. 将案件交给甲、乙共同的上级人民法院指定法院审理
C. 将案件交给甲、乙共同的上级人民法院审理
D. 将案件移交给甲人民法院，由甲人民法院处理完成

[单项选择]发生局部倒塌的工程质量事故，应由（）归口管理。
A. 国务院
B. 国家建设行政主管部门
C. 市、县级建设行政主管部门
D. 省、自治区、直辖市建设行政主管部门

[单选题]受供电企业委托的银行及其他代办机构营业窗口应悬挂委托代收电费标识，并明确告知客户其（ ）。
A.收费标准和依据
B.收费方式和时间
C.收费范围和方式
D.收费范围和方式

[不定项选择题]共用题干 第一篇

A meager（不足的）diet may give you health and long life, but it's not much fun一and it might not even be necessary. We may be able to hang on to most of that youthful（有青春活力的）vigor （精力）even if we don't start to diet until old age.
Stephen Spindler and his colleagues from the University of California at Riverside have found that some of an elderly mouse's liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks. The genetic rejuvenation（恢复活力，返老还童） won't reverse other damage caused by time for the mouse,but could help its liver metabolize（使进入新陈代谢过程）drugs or get rid of toxins.
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一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 production一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 percent of these gene changes.
"This is the first indication that these effects kick in pretty quickly",says Huber Warner from the National Institute on Aging near Washington D. C.
No one yet knows if calorie restriction works in people as it does in mice,but 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,our bodies are less 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 it."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,Lifespan Genetics in California, is looking for drugs that have the effects of calorie restriction. According to the last two paragraphs,Spindler believes that__________.
A.calorie restriction is very important to young people.
B.seeing the effect of a diet,people will like to eat less than normal.
C.dieting is not a good method to give us health and long life.
D.drugs do not have the effects of calorie restriction.

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