下列哪种因素不利于钙吸收() A.维生素D B.乳糖 C.酸性条件 D.脂肪酸 E.

题型:单项选择题 A1型题

问题:

下列哪种因素不利于钙吸收()

A.维生素D

B.乳糖

C.酸性条件

D.脂肪酸

E.氨基酸

考点:口腔执业医师预防医学(综合练习)预防医学(综合练习)题库
题型:单项选择题 A1型题

常温下,下列各组离子在指定溶液中一定能大量共存的是

A.强酸性溶液中:Mg2、K、SO42-、NO

B.强碱性溶液中:Na、Cu2、HCO、NO

C.0.1mol·L-1AgNO3溶液中:H、K、SO42-、Cl

D.0.1mol·L-1Ba(NO32溶液:Mg2+、K+、SO42-、Cl

题型:单项选择题 A1型题

数字图像的主要参数有图像分辨率、像素深度、位平面数目、彩色空间类型以及采用的压缩编码方法等。假设像素深度为16,那一幅图像具有的不同颜色数目最多是 【3】 种。

题型:单项选择题 A1型题

My newly-rented small apartment was far away from the centre of London and it was becoming essential for me to find a job, so finally I spent a whole morning getting to town and putting my name down to be considered by London Transport for a job on the underground. They were looking for guards, not drivers. This suited me. I couldn’t drive a car but thought that I could probably guard a train, and perhaps continue to write my poems between stations. The writers Keats and Chekhov had been doctors. T.S. Eliot had worked in a bank and Wallace Stevens for an insurance company. I’d be a subway guard. I could see myself being cheerful, useful, a good man in a crisis. Obviously I’d be overqualified but I was willing to forget about that in return for a steady income and travel privileges — those being particularly welcome to someone living a long way from the city centre.

The next day I sat down, with almost a hundred other candidates, for the intelligence test. I must have done all right because after about half an hour’s wait I was sent into another room for a psychological test. This time there were only about fifty candidates. The interviewer sat at a desk. Candidates were signaled forward to occupy the seat opposite him when the previous occupant had been dismissed, after a greater or shorter time. Obviously the long interviews were the more successful ones. Some of the interviews were as short as five minutes. Mine was the only one that lasted a minute and a half.

I can remember the questions now: “Why did you leave your last job?” “Why did you leave your job before that?” “And the one before that?” I can’t recall my answers, except that they were short at first and grew progressively shorter. His closing statement, I thought, revealed (揭示) a lack of sensitivity which helped to explain why as a psychologist, he had risen no higher than the underground railway. “You’ve failed the psychological test and we are unable to offer you a position.”

Failing to get that job was my low point. Or so I thought, believing that the work was easy. Actually, such jobs — being a postman is another one I still desire — demand exactly the sort of elementary yet responsible awareness that the habitual dreamer is least qualified to give. But I was still far short of full self-understanding. I was also short of cash.

小题1:The writer applied for the job chiefly because _________.

A.he wanted to work in the centre of London

B.he could no longer afford to live without one

C.he was not interested in any other available job

D.he had received some suitable training小题2:The writer thought he was overqualified for the job because _________.

A.he often traveled underground

B.he had written many poems

C.he could deal with difficult situations

D.he had worked in a company小题3:The length of his interview meant that _________.

A.he was not going to be offered the job

B.he had not done well in the intelligence test

C.he did not like the interviewer at all

D.he had little work experience to talk about小题4:What does the writer realize now that he did not realize then?

A.How unpleasant ordinary jobs can be.

B.How difficult it is to be a poet.

C.How unsuitable he was for the job.

D.How badly he did in the interview.小题5:What’s the writer’s opinion of the psychologist?

A.He was very aggressive.

B.He was unhappy with his job.

C.He was quite inefficient.

D.He was rather unsympathetic.

题型:单项选择题 A1型题

银屑病表皮更替时间大约是()

A.14~18天

B.3~4天

C.36~42天

D.8~12天

E.37.5小时

题型:单项选择题 A1型题

“CIF Ex Tackle”指货物运达目的港在船上交接后,自船舱底起吊直至卸到码头的卸货费用,均由买方负担。 ( )

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