当比较液相色谱检测器的性能时，常使用敏感度这一指标。敏感度即指信号与噪声的比值（信噪

血象中全血细胞减少，骨髓涂片增生减低，即可诊断为再生障碍性贫血。

女，6岁，低热1天后发现躯干皮肤出现散在分布的红色斑丘疹，继之变为透明的水疱，逐渐混浊并部分破溃，有痒感，枕后浅淋巴结如黄豆大小多个，精神尚可，食欲减退，大小便正常。

下列哪项诊断优先考虑（）

A.丘疹性荨麻疹

B.水痘

C.手足口病

D.脓疱疮

E.风疹

The Board Meeting had come to an end. Bob started to stand up and knocked into the table, spilling his coffee over his notes. “How embarrassing! I am getting so clumsy(笨拙的) in my old age.”

Everyone had a good laugh, and soon we were all telling stories of our most embarrassing moments. It came around to Frank, who sat quietly listening to the others. Someone said, “Come on, Frank. Tell us your most embarrassing moment.”

Frank laughed and began to tell us of his childhood. “I grew up in San Pedro. My Dad was a fisherman, and he loved the sea. He had his own boat, but it was hard making a living on the sea. He worked hard and would stay out until he caught enough to feed the family. Not just enough for our family, but also for his Mom and Dad and the other kids that were still at home.”

He looked at us and said, “I wish you could have met my Dad. He was a big man, and he was strong from pulling the nets and fighting the seas for his catch. When you got close to him, he smelled like the ocean. He would wear his old canvas, foul-weather coat and his bibbed overalls. His rain hat would be pulled down over his brow. No matter how much my mother washed them, they would still smell of the sea and of fish.”

Frank’s voice dropped a bit. “When the weather was bad he would drive me to school. He had this old truck that he used in his fishing business. That truck was older than he was. It would wheeze and rattle down the road. You could hear it coming for blocks. As he would drive toward the school, I would shrink (畏缩) down into the seat hoping to disappear. Half the time, he would slam to a stop and the old truck would belch (喷出) a cloud of smoke. He would pull right up in front, and it seemed like everybody would be standing around and watching. Then he would lean over and give me a big kiss on the cheek and tell me to be a good boy. It was so embarrassing for me. Here, I was twelve years old, and my Dad would lean over and kiss me goodbye!”

He paused and then went on, “I remember the day I decided I was too old for a goodbye kiss. When we got to the school and came to a stop, he had his usual big smile. He started to lean toward me, but I put my hand up and said, “No, Dad.” It was the first time I had ever talked to him that way, and he had this surprised look on his face. I said, “Dad, I’m too old for a goodbye kiss. I’m too old for any kind of kiss.” My Dad looked at me for the longest time, and his eyes started to tear up. Then he turned and looked out of the windshield(挡风玻璃). “You’re right,” he said. “ You are a big boy....a man. I won’t kiss you anymore.”

Frank got a funny look on his face, and the tears began to well up in his eyes, as he spoke. “It wasn’t long after that when my Dad went to sea and never came back. It was a day when most of the fleet (船队) stayed in, but not Dad. He had a big family to feed. They found his boat adrift with its nets half in and half out. He must have gotten into a strong wind and was trying to save the nets and the floats.”

I looked at Frank and saw that tears were running down his cheeks. Frank spoke again. “Guys, you don’t know what I would give to have my Dad give me just one more kiss on the cheek…to feel his rough old face… to smell the ocean on him… to feel his arm around my neck. I wish I had been a man then. If I had been a man, I would never have told my Dad I was too old for a goodbye kiss.”

小题1:When his father drove him to the school, Frank would shrink down into the seat hoping to disappear because ________.

A．he was ashamed of his father’s old truck

B．he didn’t want his schoolmates to see his father

C．he thought he was old enough to go to school alone

D．he hated the way his schoolmates stared at his father小题2:According to the story we can conclude that Frank’s father ________.

A．was quite confident in his skills in fishing

B．loved his children but hardly expressed it

C．seldom gave up faced with challenges

D．was full of devotion to his family小题3:By saying the sentence “I wish I had been a man then…”, Frank meant ________.

A．he was tired of his father kissing him goodbye

B．he deeply regretted what he had done to his father

C．he was then too young to refuse a goodbye kiss

D．he hoped that his father would forgive him小题4:Which of the following may be the best title for this passage?

A．The Smell of the Ocean

B．We All Need Love

C．A Goodbye Kiss

D．Father’s Embarrassment

19世纪后半期，欧洲某人创作了下边的这幅漫画，用来讽刺一位近代生物科学的奠基者的思想，这位科学家是

[ ]

A．达尔文

B．达·芬奇

C．赫胥黎

D．伏尔 泰

案例一

某房地产开发公司开发的某住宅小区，由甲物业管理公司承担前期物业管理。业主于2003年8月开始入住，2005年5月该小区召开首次业主大会会议，选举产生了业主委员会，并按照业主大会决议选聘了乙物业管理公司。业主委员会与乙物业管理公司签订了物业服务合同,合同于2005年8月1日零时生效。业主委员会以书面形式通知甲物业管理公司应于2005年8月1日前办理完成物业交接验收手续。甲物业管理公司收到业主委员会书面通知后，安排了该小区管理服务人员退场，但以部分业主欠缴物业服务费为由，拒绝移交相应的物业管理资料，拒不配合物业交接查验。
2006年8月15日，顶层的20户业主发现房间在雨天渗水，于是联名要求乙物业管理公司无偿修复。乙物业管理公司称这是因甲物业管理公司管理不善所致，应由甲物业管理公司负责修缮。之后，乙物业管理公司不再受理业主有关该问题的投诉。
[问题]

上述20户业主提出的修复请求是否合理是否应由乙物业管理公司负责无偿修复