It’s nice to see you again. What _____ s

题型:选择题

问题:

It’s nice to see you again. What _____ since we last met?  

A.have you done

B.had you done

C.have you been doing

D.did you do

考点:一般现在时将来进行时过去完成进行时过去将来时的被动语态
题型:选择题

男性,56岁。梗阻性黄疸1月余。CT检查显示扩张胆管突然中断,末端层面见到软组织肿块,出现胆管不规则变窄,管壁增厚。最可能的诊断为()

A.胆总管结石

B.胆管炎症狭窄

C.胆总管下端癌

D.胰头癌

E.先天性胆总管扩张

题型:选择题

I suppose that having been brought up in the countryside and close  to animals,it wasn’t remarkable(不平常的)when I decided  to become a vet(兽医).Luckily I was also good at all the necessary science subjects. So after the college entrance examination I found myself at a veterinary college,training to look after animals in all kinds of situations. I hoped that I would be able to work in the research field so that I could find cures for animal diseases.

Much to my surprise,I found public health care was a very important aspect of my course. This is an area of animal medicine where a vet’s work has many things in common with the work of a doctor of human diseases. I particularly liked it because I recognized that the study of animal diseases can help human medicine. As we know,many infectious diseases come from animals—including SARS and bird flu.

Some of the infections have only been understood after carefully analytical work in labs by animal doctors. They helped identify the animal source for diseases such as SARS. They were also the first to identify various kinds of viruses. Sometimes vets are also able to suggest a cure for human illnesses. When I found this out I was determined to make public health medicine my chosen career.

After graduation,I applied for a job in public health. Soon I found myself concerned with the problem of bird flu. This is  an illness that attacks birds,but humans can catch the disease  if they are in close contact with infected birds. Though the job  is dangerous,it makes me proud that vets and other animal  disease researchers are in the front line helping to fight these  unknown human diseases

小题1:The writer wanted to become a vet mainly because______.

A.he did well in all necessary subjects

B.he wanted to help animals

C.he was close to animals in his early life

D.he wanted to find cures for human diseases小题2:What made the writer particularly like the course of public health care was that________.

A.it was both important and interesting

B.it could help him connect many human diseases with animals

C.it made a vet’s work very much like a doctor’s

D.it could help human medicine by studying animal diseases小题3:What can be followed if this passage continues?

A.The writer’s happy family life.

B.How the writer did research work in studying bird flu.

C.How the writer dealt with the relationship with other workmates.

D.What difficulty the writer met in the research work.小题4:Which of the following is implied in the passage?

A.Animals with infectious diseases should be killed.

B.Keeping animals is dangerous to humans.

C.Dangerous as a vet’s job is,it is significant to the human race.

D.Animal researchers work in the same way as human doctors.小题5:Which of the following statements is NOT true?

A.Being a vet is helpful to both animals and humans.

B.Vets can cure both animals and humans.

C.Vets helped identify animal resources for SARS.

D.Both SARS and bird flu are infectious diseases coming from animals.

题型:选择题

患者男性,25岁,风湿性心脏病。心电图示心房颤动,其中有3个单发宽大畸形的QRS波群,在V1导联呈rsR’型,联律间期不等,无类代偿间歇。

引起上述现象的机制是

A.右束支相对不应期长于左束支
B.左束支相对不应期长于右束支
C.心室内折返
D.心室自律性增高
E.以上都不是

题型:选择题

在跆拳道运动中,()带是代表有至高水平的象征。

A.白带

B.红带

C.蓝带

D.黑带

题型:选择题

肉眼鉴别侵入岩与喷出岩的主要标志是()

A、矿物成分,

B、颜色,

C、结构和构造

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