什么叫自感应？什么叫自感电动势？

Working Christmas Day

It was unusually quiet in the emergency room （急诊室） on December25.

I didn't think there would be any patients, complaining about having to work on. Just then five people showed up at my desk, a pale woman and four small children.

"Are you all sick?" I asked doubtfully.

"Yes," she said weakly and lowered her head.

But when it came to descriptions of their problems, things got a little unclear. Two of the children had headaches, but I couldn't find any normal body language of holding the head or trying to keep it still. Two children had earaches, but only one could tell me which ear was hurting. The mother complained of a cough but seemed to work to produce it.

Something was wrong, but I didn't say anything but explained that it might be a little while before a doctor saw her. She replied, "Take your time; it's warm in here."

I checked the form after the admitting clerk had finished her work with the family. No address — they were homeless. The waiting room was warm.

I looked out at the family standing by the Christmas tree. The youngest one was pointing at the television and shouting something to her mother. The oldest one was looking at the colorful Christmas tree.

I went back to the nurses' station and mentioned we had a homeless family in the waiting room. The nurses, complaining about working Christmas, turned to pity for a family just trying to get warm on Christmas. The team went into action, much as we do when there's a medical emergency. But this one was a Christmas emergency.

We were all offered a free meal in the hospital dining hall on Christmas Day, so we prepared a big one for our Christmas guests. We needed presents, too. We put together oranges and apples in a basket. We collected from different departments candies, crayons and other things that could be presents. As seriously as we met the physical needs of the patients that came to us that day, our team worked to meet the needs, and beyond the expectations, of a family who just wanted to be warm on Christmas Day.

Later, as the family walked to the door to leave, the four-year-old came running back, gave me a hug and whispered, "Thanks for being our angels today."

小题1:Why did the family come to the hospital?

A．They were sick.

B．They were cold and hungry.

C．They wanted to visit friends.

D．They got all their money lost.小题2:How did the writer and her workmates help the family?

A．They offered a free meal to them.

B．They bought some presents for them.

C．They sent for a doctor for them.

D．They asked them to stay overnight in the hospital.小题3:What can we learn from the passage?

A．The mother was seriously ill.

B．The family were driven out of the hospital.

C．The writer and her workmates always liked to work on Christmas.

D．The family thanked the writer and her workmates for their kindness.

关于脑出血，最确切的诊断依据是

A．均有偏瘫

B．60岁以上发病

C．脑脊液血性

D．突然偏瘫，头部CT见基底节区附近高密度影

E．均有脑膜刺激征

从总体上看，我国生态环境恶化的趋势初步得到遏制，部分地区有所改善。但是，目前我国环境形势依然相当严峻，不容乐观。严峻的环境形势迫使我们必须[ ]

①坚持可持续发展 ②为了经济的发展，可以走先污染后治理的老路 ③认识到保护和改善环境也就是保护和发展生产力，绝不能以破坏环境为代价求得经济的一时发展，绝不能把环境保护与经济建设对立或割裂开来，绝不能走先污染后治理的老路 ④把保护环境，作为我国的一项基本国策

A．②③④

B．①②③

C．①③④

D．②④

乙型肝炎患者抗病毒治疗可采取的措施不包括（）

A.护肝片

B.α-干扰素

C.γ-干扰素

D.核苷类药物

E.某些中药

给水泵密封水差压低至（）并且内侧（）时，给水泵跳闸。