有一台测温仪表,其测温范围为200~700℃,仪表的最大绝对误差为±4℃,试确定该仪

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问题:

有一台测温仪表,其测温范围为200~700℃,仪表的最大绝对误差为±4℃,试确定该仪表的允许误差。

考点:综合计量工考试初级综合计量工初级综合计量工题库
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Middle school days are both fun and busy. Students spend their days in class, listening to the interesting and        boring words of the teacher. They spend the short breaks running, playing and shouting happily        going back to the classroom again. But        should students spend their free time outside school?
In Western countries, it is ordinary for students to have a part-time job after school and at weekends. Students can make their own money and learn more about the “        world”. They enjoy the independence(独立) and(of course) money, and parents enjoy the quiet house.        , it seems that, in China, parents        so much about their children’s studies that they prefer to see their children        most of their free time studying and preparing for all those exams. It is natural for        to feel that way in China, but I believe the answer lies in balance. Sometimes, western school children work long hours after school to make money, so they become too tired to listen in class or have no time for homework. But Chinese students spend        much time on their studies that other things become3 less important.
So, find a good and healthy balance! If you have a part-time job and you feel        , your parents will also be happy because you’re spending the money you make and not theirs!
小题1:
A.alwaysB.sometimesC.foreverD.even
小题2:
A.whileB.afterC.beforeD.without
小题3:
A.whereB.whatC.whyD.how
小题4:
A.trueB.realC.developingD.developed
小题5:
A.Because B.AndC.HoweverD.Although
小题6:
A.knowB.talkC.worryD.complain
小题7:
A.spendB.useC.talkD.keep
小题8:
A.studentsB.teachersC.childrenD.parents
小题9:
A.suchB.soC.very D.too
小题10:
A.happyB.tiredC.nervousD.busy
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根据《医疗事故处理条例》的规定,患者或其家属应当自其知道或应当知道其身体健康受到损害之日起多长时间内向卫生行政部门提出医疗事故争议处理的申请()

A.15日

B.6月

C.1年

D.2年

E.3年

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视网膜母细胞瘤是婴幼儿最常见的眼内恶性肿瘤。视网膜母细胞瘤基因(Rb)是第一个被克隆的抑癌基因,它被定位于人类第13号染色体上。医生Kundson在观察研究中发现,某些家庭中儿童恶性的“视网膜母细胞瘤”发病率比正常人群高1000倍。下表是他记录的甲患者和乙患者的部分信息,基因A表示正常的Rb基因,基因a表示失活的Rb基因。请回答相关问题:

(1)人类13号染色体上的基因A通过______和_______过程,控制合成了视网膜母细胞瘤蛋白(pRb),保证了正常的细胞凋亡过程,从而抑制了细胞癌变。

(2)甲、乙患者的正常细胞在个体发育的过程中都发生了_________,因而癌细胞的13号染色体上均无正常的视网膜母细胞瘤基因。请根据表中信息分析甲患者家族中视网膜母细胞瘤发病率明显高于乙患着家族的主要原因是:_____________________。

(3)甲的父母计划再生育一个孩子,他们向医生进行遗传咨询,医生认为子代的肿瘤再发风险率很高。基因A可能变异而失活的的两个时期__________和_________。为达到优生目的,医生建议他们进行产前诊断,主要是用_________的手段对胎儿进行检查。

题型:问答题 简答题

A: How often do you exercise?   B: _____ .     [ ]

A. For two hours    

B. Never  

C. By bus       

D. More than half an hour

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下列活动中,属于履行政府职能的是[ ]

①中 * * 召开党的十七届三中全会 ②实施南水北调工程 ③国务院决定成立全国防治高致病性禽流感总指挥部,负责处理全国防治工作的具体事务 ④开展“严打”整治活动

A.①③④

B.①②④

C.②③④

D.①②③④

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