加速电压

在消防演习中，消防队员从一根竖直的长直轻绳上由静止滑下，经一段时间落地．为了获得演习中的一些数据，以提高训练质量，研究人员在轻绳上端安装一个力传感器并与数据处理系统相连接，用来记录消防队员下滑过程中轻绳受到的拉力与消防队员重力的比值随时间变化的情况．已知某队员在一次演习中的收集的数据如图所示，g取10m/s²．

（1）求该消防队员在下滑过程中的最大速度和落地速度各是多少？

（2）消防队员在下滑过程的总位移？

临床上出现微量白蛋白尿，表示已到糖尿病肾病病期（）。

A.Ⅴ期

B.Ⅲ期

C.Ⅱ期

D.Ⅰ期

E.Ⅳ期

第三节：完型填空（共20小题；每小题1.5分，满分30）

阅读下面短文，从短文后各题所给的四个选项(A、B、C、和D)中，选出可以填人空白处的最佳选项，并在答题卡上将该项涂黑。

Eleven-year-old Angela was attacked by a rare    36   involving her nerve system．She was unable to walk and her movement was   37   in other ways as well．The doctors did not hold much   38   of her ever recovering from this illness．They   39   she'd spend the rest of her life in a wheelchair．They said that few, if any, were able to come back to    40   after suffering from this disease．The little girl was   41  ．There, lying in her hospital bed, she would swear that she was   42   going to be walking again someday．

She was moved to a specialized   43   hospital in the San Francisco Bay area．Whatever   44   could be applied to her case were used．The doctors were attracted by her undefeatable spirit．They taught her about imaging about seeing herself walking．If it would do   45   else, it would at least give her hope and something   46   to do in the long waking hours in her bed． Angela would work as hard as possible in physical treatment, and in exercise sessions．But she worked just as hard lying there faithfully doing her   37   , visualizing herself moving, moving, moving ！

One day,   48   she was attempting, with all her might, to imagine her legs moving again, it seemed as though something   49   happened: the bed moved! It began to move around the room! She   50   out, "Look what I'm doing! Look'．Look! I can do it'．I moved! I moved!"

Of course, at this very moment everyone else in the hospital was screaming, too, and running for   51   People were screaming, equipment was   52   and glass was breaking．You see, it was the recent San Francisco earthquake．   53   don't tell that to Angela．She's   54   that she did it．

And now only a few years later, she's back in school, on her own   55  ．No crutches, no wheelchair．You see, anyone who can shake the earth between San Francisco and Oakland can defeat a little disease, can't they?

36．A．problem   B．disease         C．accident    D．error

37．A．reduced    B．avoided       C．restricted  D．forced

38．A．thought    B．idea          C．opinion     D．hope

39．A．predicted  B．prepared      C．admitted   D．decided

40．A．active       B．normal        C．alive     D．confident

41．A．fearless     B．peaceful       C．patient      D．stainless

42．A．probably   B．approximately  C．sincerely   D．certainly

43．A．recovery   B．experiment       C．practice    D．exercise

44．A．schedules  B．instructions      C．supports    D．treatments

45．A．something B．anything      C．nothing     D．everything

46．A．admirable B．interesting     C．optimistic D．appropriate

47．A．training    B．imaging       C．expectation      D．performance

48．A．however   B．after         C．just      D．as

49．A．useful       B．regretful      C．surprising D．disgusting

50．A．screamed  B．laughed       C．spoke       D．sang

51．A．ground     B．cover         C．ceiling      D．bed

52．A．accelerating     B．running    C．appearing  D．falling

53．A．For      B．So            C．But      D．Or

54．A．convinced B．supposed      C．realized    D．accepted

55．A．parts     B．legs          C．body     D．role

根据《民法通则》的有关规定，下列选项中，适用于诉讼时效期间为4年的情形有 ( )。

A．延付或者拒付租金的

B．环境污染损害赔偿提起的诉讼

C．履行买卖合同违约的

D．技术进出口合同争议

与随机误差比较，系统误差的特点为（）。

A、系统误差具有规律性、确定性

B、系统误差具有随机性

C、产生系统误差的因素在测量之前就已存在

D、系统误差具有抵偿性