下列关于北魏孝文帝改革后民族融合表现的叙述，不符合史实的是[ ] A．迁居洛阳的

以下关于上颌窦癌的叙述，哪项是错误的（）

A.以鳞状细胞癌为最常见

B.早期无症状而不易发觉

C.肿瘤发生部位不同可出现不同临床症状（如鼻塞、复视、张口受限等）

D.早期即有明显的骨质破坏

E.远处转移较少见

慢性胃溃疡病的病变最好发于（）

A.胃大弯近幽门部

B.胃小弯近幽门部

C.胃大弯及胃底部

D.胃体部

E.胃小弯近贲门部

For almost two months Dominic York, a 23-year-old hairdresser, wandered about hospitals all night, wearing a white coat and pretending he was a doctor. Yesterday he proudly claimed in court that despite his complete lack of medical experience or qualifications, he had saved several people’s lives. He had even been allowed to assist a surgeon during an emergency operation on a patient who was about to die on something she had swallowed.

“I watched one of those TV dramas about a hospital and suddenly I felt like playing one of the roles myself. So I put on a white jacket and a stethoscope (听诊器) and walked around one of the biggest hospital in London. At first I just watched. Once you learn how doctors talk to patients, nurses and others doctors, it’s easy to take people in,” he said.

One of the patients he treated was Laura Kennan. She had been knocked down by a car and fainted. When she came to in hospital, York was standing over her.

“He looked very professional. He told me his name was Doctor Simon. Then he gave me some sort of injection,” she said. And then he suddenly cleared off when a nurse asked who he was. She didn’t think there was anything wrong. “I would never have realized he was a fake if a policewoman hadn’t showed me his photograph a week later. When the policewoman told me who he really was, I could hardly believe my ears.”

Judge Raymond Adams told York that he was. “ shocked and horrified” that he got away with his deceiving for so long, and then sentenced him to eighteen months in a special prison for criminal with mental disorders.

“I can only hope that this will not lead to further problems. After all, you will have considerable opportunity to study the behaviour of the psychiatrists(精神科医生)who will look after you while you are there. If you try to persuade people that you yourself are a psychiatrist after you are set free, I shall make sure that you are given a much longer sentence.” Judge Adams warned York.

小题1:York was proud of the fact that ___________.

A．a surgeon let him watch an operation.

B．he could perform some duties of a doctor.

C．he had cheated doctors for so long

D．people thought he could become a real doctor小题2:York learned how to behave like a doctor by __________.

A．watching other doctors work

B．talking to doctors and nurses

C．getting some training and experience

D．observing doctors while he was a patient小题3:Why was Laura Kennan in hospital?

A．She had swallowed something and almost died.

B．She had to have and emergency operation.

C．She had been injured in a road accident.

D．She had lost consciousness while driving.小题4:The judge’s remark implied that York would be more severely punished if he _________.

A．pretended to be a psychiatrist

B．tried to get away from prison

C．was proud of what he had done

D．studied the behaviour of the psychiatrist

幼儿园里，玩具为集体所有，不符合卫生条件的玩具或对玩具管理不当，都可能成为传播疾病的途径或对幼儿产生其他危害。请分析幼儿园玩具的卫生现状，并说明幼儿玩具的卫生要求。

某高可靠性计算机系统由图4-6所示的冗余部件构成。若每个部件的千小时可靠度尺均为0.9，则该计算机系统的千小时可靠度为 (5) ；该计算机系统的失效率可使用 (6) 来计算。(注：t表示时间)
[*]

A．In R/t

B．-In R/t

C．log₂R/t

D．-log₂R/t