[判断题][判断题] 静态检测中线岔、自动过分相地面磁感应器的检测周期-我要搜题网

[填空题]整流电路是利用二极管的（）性，将交流电变为单向脉动的直流电。稳压二极管是利用二极管的（）特性实现稳压的。

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[单项选择]移动瓦斯抽放泵开机前需要做的准备工作之一是（）
A. 迅速将所有的放空阀门和配风阀门关闭
B. 检查抽放泵的油路、水路是否畅通，水泵是否上水
C. 迅速将各别的放空阀门和配风阀门打开

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[判断题]变电检测验收内容包括检测项目无遗漏、数据记录无误、场地清理干净、被测设备外观整洁、零部件标志齐全且恢复到工作许可前的电气接线状态。
A.正确
B.错误

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[单项选择]衡量社会主义教育质量的标准是（）
A. 培养一批尖子学生
B. 学生德、智、体、美等方面的全面发展
C. 全体学生平衡发展
D. 每个学生都有所长

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[判断题]进给量越大零件表面粗糙度值越小（）

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[单选题]电动机的允许温升与有关。( )
A.电动机的容量
B.电动机的额定电流
C.电动机采用的绝缘材料
D.电动机的额定电压

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[不定项选择题]共用题干 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 to most of that youthful vigor 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 won't reverse other damage caused by time for the mouse,but could help its liver metabolize 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-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-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 ol- der,our bodies are less efficient at metabolizing drugs,for example.A brief period of time of die- ting,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. 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.

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[多项选择]安全用电应注意的事项包括（）。
A. 不用湿手湿布擦带电开关
B. 避免超负荷
C. 不私自拉接电线
D. 不在电杆、电线下放爆竹
E. 不攀爬电杆

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[单项选择]Trying to get Americans to eat a healthy diet is a frustrating business. Even the best- designed public-health campaigns cannot seem to compete with the tempting flavors of the snack-food and fast-food industries and their fat-and sugar-laden products. The results are apparent on a walk down any American street--more than 60% of Americans are overweight, and a full quarter of them are overweight to the point of obesity.
Now, health advocates say, an ill-conceived redesign has taken one of the more successful public-health campaigns--the Food Guide Pyramid--and rendered it confusing to the point of uselessness. Some of these critics worry that America’ s Department of Agriculture caved in to pressure from parts of the food industry anxious to protect their products.
The Food Guide Pyramid was a graphic which emphasizes that a healthy diet is built on a base of grains, vegetables and fruits, followed by ever-decreasing amounts of
A. the effect of a well designed graph might be very small.
B. the new pyramid is definitely doomed to be a failure.
C. political influence will never be waved from the design.
D. the Potato Board of the country is very influential.

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[单选题]党的十一届五中全会决定向全国人民代表大会建议修改宪法第 ( )条,取消公民“有运用大鸣.大放.大辩论.大字报的权利”的规定,因为历史经验已经证明,“四大”作为一个整体从未起过积极作用,取消它符合全国人民的意愿和要求。
A.四十四
B.四十五
C.四十六

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[单项选择]天然气的相对密度公式是（）。
A. S=ρ/1.293
B. ρ=m/Vm
C. S=m/Vm
D. ρ=1.293

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[单选题]中固有一句古话,”山中方七日,世上已千年。”这句话包含的哲理是( )。
A.时间的绝对性
B.时间的相对性
C.时间的无限性
D.时间的有限性

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[单项选择]The articulated light is superior to other types of buoys because（）.
A. the radar reflectors reflect better signals
B. fog horn signals travel farther to sea
C. it is equipped with strobe lights
D. it has a reduced watch circle

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[单选题]手工钨极氩弧焊焊接铝镁合金时.应采用( )
A.丝301
B.丝321
C.丝311
D.丝331

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[多选题]按耐风压强度分类代号80的防火卷帘的耐风压强度为（）/PA时，不符合规范要求。
A.490
B.780
C.784
D.1177

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[多选题]建筑物倒塌的种类有( )。
A.倾斜状倒塌
B.“V”型倒塌
C.平降倒塌
D.梯形倒塌

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[单选题]看光缆截面，领示色光纤（或松套管）以( )顺时针为A端，逆时针为B端。
A.红黄
B.黄红
C.红绿
D.绿红

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[多选题]中山农商行财务开支实行（）的原则。
A.统一核算
B.集中管理
C.逐级审批
D.规范操作

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[单项选择]放空系统中分离原料气中的油、水等杂质的设备是（）。
A. 酸气放空分液罐
B. 原料气放空分液罐
C. 火炬筒
D. 分子封

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[单选题]铁路法适用于国家铁路、地方铁路、专用铁路和铁路专用线。
A.国家铁路
B.地方铁路
C.专用铁路和铁路专用线
D.以上都是

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[单项选择]有统计显示：在英国1700—1790年间，有400多万英亩荒地被开垦成农田；1700年，一个农民大约可以养活1．7个人，到1800年可以养活2．5个人，农业生产率在100年间提高了47%……1600—1800年间，英格兰人均农业工人产量增加73%。这说明当时英国（）
A. 农业经济是国民经济的支柱
B. 工业产值逐步超过农业产值
C. 工业革命促进农业经济发展
D. 农业科技创新使农业生产率提高

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[判断题]允许利用隔离（负荷）开关对故障线路进行试送电。
A.正确
B.错误

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[单项选择]At first the company refused to purchase the equipment, but this decision was ______ revised.

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[判断题]从业人员依法获得劳动安全生产保障，是劳动者应享有基本的权利。
A.正确
B.错误

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[单选题]对张力性气胸伤员用针头穿刺排气处理应在哪一级的救治单位实施抢救（　　）
A.连抢救组
B.营或舰船救护所
C.团、码头或乙级场站救护所
D.师、支队或甲级场站救护所

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[单选题]从业人员应当接受安全生产教育和培训,掌握本职工作所需的安全生产知识,提高安全生产技能,增强事故预防和( )。
A.救护能力
B.逃生能力
C.应急处理能力

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[判断题]《山东省农村商业银行小微企业贷款尽职免责实施细则》中规定，审查通过直接或较为明显垒大户贷款的，审查人员不得免责。（）
A.正确
B.错误