50赫工频交流电的安全电压额定值是指（）值。A、最大 B、有效 C、平均

200×年×月×日9时左右，某化机厂三车间，在起吊不锈钢板过程中，发生了一起因钢板脱钩坠落，造成1人死亡的事故。 200×年×月×日早上8时30分，某化机厂三车间运来一车不锈钢板，汽车进入三车间后，因下货处距汽车20m，需用行车起吊。当时，行车操作工王某操作行车，贺某负责指挥，赵某在汽车东边挂钩，伊某在西边挂钩。当时贺某站在汽车东边。抵某当时在闪蒸器南边打扫卫生。大约8时40分左右，第三次起吊钢板(每次起吊6块，前面已起吊过2次)。当钢板吊起离开汽车后，距地面大约2.5m左右，横向西2m左右，起吊钢板快接近切割转台时，王某发现不锈钢板南北上下出现晃动，此时吊车未停，向南点打。大约9时左右，贺某发现有人在闪蒸器北边站立(危险区)，立即向王某打手势，并大声呼喊。王某看见贺某用手挥动，并大声喊“唉--”，按惯例，她意识到要紧急停车，于是王某立即紧急停车。此时钢板脱离吊钩，由南向下坠落，刹时，车间尘土飞扬。在场的贺某、赵某等人已意识到出事了。当他们赶到出事地点时，发现抵某仰躺在闪蒸器南边，脚在闪蒸器下面。贺某、赵某等人赶紧找车将抵某送往医院，经医院抢救，因抵某脑部严重受损，抢救无效，于11时左右死亡。 事故发生后，成立了事故调查组，经过调查发现该车间存在如下问题； (1)车间安全制度、规程不完善，班组职工没有进行过安全教育和学习，车间会议上对吊装作业未强调安全措施。 (2)车间设备安全员卫某，对车间吊装作业疏于安全检查，对行车操作工王某是否应有特殊工种作业证不清楚。 (3)行车设备存在锈蚀严重，未能按规定进行维护保养，吊钩未采用防滑吊钩，也未采取防滑措施。 (4)车间现场安全通道不畅。比如切割转台、闪蒸器、其他设备均在通道区域内，在用钢板、废料等摆放不定置，不规范，影响了操作人员的视线和行车的正常运行。 对分厂和总厂安全工作调查发现： (1)分厂安全工作由分厂书记兼管，安全人员少且素质差，分厂未定期进行安全教育。 (2)总厂厂长李某身为全厂一把手，平时对企业安全宣传教育和对职能部门监督检查要求不严。 (3)总厂主管生产安全的副厂长李某某平时对生产强调得多，对安全强调得少，对分厂安全监督检查工作抓得不力，对安全教育要求不严。 (4)总厂综管处分管安全的王某，身为总厂专管安全的处长，没有把主要精力放在安全管理上，而是放在全厂经济考核上，对三车间长期存在的隐患，监督检查不力、整改落实不到位。 根据以上内容回答下列问题。 1．试分析这起事故的直接原因。 2．试分析这起事故的间接原因。

患者女性，25岁。5年来长期服用氯硝西泮片治疗失眠症状，近2年来为了达到满意的睡眠效果，持续性的服用该药物，并且药物剂量不断增加。若患者睡前不服或减少服用量则夜间难以入睡，第二天更是无精打采，浑浑噩噩，无法集中注意力，影响正常工作和生活。

该病人应考虑疾病是（）

A.焦虑症

B.抑郁症

C.药物依赖

D.心因性精神障碍

E.癔症

关于小肠下列所述不正确的是（）

A、长度一般5m~7m 

B、吸收作用主要在上部小肠 

C、空肠可见钟摆运动 

D、回肠末端可见逆蠕动 

E、回肠管腔壁较空肠厚 

PART THREE  READING COMPREHENSION (30 points)

Directions: There are 3 passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should choose the answer that fits best according to the information given in the passage.

A

One dark and stormy night, an elderly man and his wife entered the hall of a small hotel in Philadelphia, hoping to get room for the night.

The clerk, a friendly man with a beautiful smile, explained that there were three conferences in town. “All of our rooms are taken,” the clerk said, “but I can't send a nice couple like you into the rain at one o’clock in the morning. Would you perhaps be willing to sleep in my room? It’s not a suite(套房), but it will be good enough to make you comfortable for the night.” The couple agreed.

As the elderly man paid the bill the next morning, he told the clerk, “You are the kind of person who should be the boss of the best hotel in the United States. Maybe someday I’ll build one for you.” The clerk looked at them and smiled. The three of them had a good laugh.

Two years passed. The clerk had almost forgotten the incident when he received a letter from the elderly man, asking the clerk to pay him a visit. The elderly man met him in New York, and led him to the corner of the Fifth Avenue and 34th Street. He then pointed to a great new building there, a reddish stone one with watchtowers(塔楼) thrusting up to the sky, and told the clerk that it was the hotel he had just built for him。

That wonderful building was the original Waldorf-Astoria Hotel. And this young clerk whose names was George C. Boldt never foresaw the return of events that would lead him into the manager of one of the world's most attractive hotels.

56 .When the elderly couple left the hotel, they      .

A. tried to make the clerk pleased

B. wanted to build the same hotel in the future

C. hoped that the clerk would replace the boss of the hotel

D. thought the clerk was talented in managing hotels

57. Why did the elderly man build a hotel for the clerk?

A. He was grateful to the clerk.         B. They had a bet(打赌) at first.

C. He wanted to fool the clerk.         D. He wanted to sell the hotel.

58. According to the text, the clerk      .

A. helped the couple because he thought they were poor

B. hoped that the old couple could give him a large amount of money

C. didn't expect to receive things in return from the old couple

D. became rich, thanks to his own efforts

59. From the text, we can infer that      .

A. anybody can be a successful manager          B. old people are always very rich

C. good luck is always waiting for lucky people    D. kindness can bring a good return

60. What do you think of the clerk?

A. He was willing to help.                      B. He was very attractive.

C. He tried to make money for his hotel．         D. He liked making friends

患儿11岁，因无尿3天入院：查电解质示K⁺7．8mmol／L。下列处理不妥的是（）。

A.用碳酸氢钠

B.用10％葡萄糖酸钙

C.葡萄糖+胰岛素（5克葡萄糖+1单位胰岛素）

D.透析

E.输库血纠正贫血