两个带正电的小球,放在光滑的水平绝缘板上,它们相距一定距离.若同时释放两球,它们

题型:选择题

问题:

两个带正电的小球,放在光滑的水平绝缘板上,它们相距一定距离.若同时释放两球,它们的加速度之比将(  )

A.增大

B.先增大后减小

C.保持不变

D.减小

考点:库仑定律
题型:选择题

Model DPCD-7 track produced by HUAGUANG Manufactures is designed for large-scale transportation and long journey. The truck is a new type with very attractive appearance, and is safe, comfortable and very easy to be operated, repaired and maintained. It can carry 20 tons of goods in an ample space. The price is as low as that of a car. Ring 62575864 now and get it tomorrow.

题型:选择题

血浆内胆固醇脂化时的脂肪酸供体()

A.磷脂酰胆碱

B.溶血磷脂

C.三酰甘油

D.二酰甘油

E.脂酰辅酶A

题型:选择题

阅读理解。

     When Boris left school, he could not find a job. He tried hard and pestered (纠缠) his relatives,

but they had problems of their own. He answered advertisements until he could not afford to buy

any more stamps. Boris grew annoyed, then depressed, then a little hardened. Still he went on trying

and still he failed. He began to think that he had no future at all.

     "Why don't you start your own business?" one of his uncles told him. "The world is a money-locker.

You'd better find a way of opening it."

     "But what can I do?"

     "Get out and have a look round." advised his uncle in a vague sort of way. "See what people want;

then give it to them, and they will pay for it."

      Boris began to cycle around the town and found a suitable piece of a waste ground in the end.

Then he set up his business as a cycle repairer. He worked hard, made friends with his customers

and gradually managed to build up his goodwill and profit. A few months later, he found that he had

more work than he could deal with by himself. He found a number of empty shops but they were all

no good: in the wrong position, too expensive or with some other snag(障碍). But at long last, he

managed to find an empty shop on a new estate where there were plenty of customers but no

competition.

      Boris and his assistant taught themselves how to repair scooters and motor-cycles. Slowly but

surely the profits increased and the business developed. At last, Boris had managed to open the

money-locker and found bank notes and gold coins inside.

1. Which of the following best describes Boris' job hunting experience?

A. Surprising.

B. Encouraging.  

C. Boring.

D. Disappointing.

2. Which of the following would be the best title for the passage?

A. Goodwill is the key to success

B. The world is a money-locker

C. No education, no future

D. Difficulty of starting a small business

3. Boris started his career by       .

A. repairing cycles          

B. developing a waste ground

C. cycling around the town              

D. buying empty shops

4. Boris finally chose an empty shop on a new estate because       .

A. it was not so expensive          

B. he had a lot of old customers there

C. there were good opportunities there

D. he could make good use of his skills there

5. We can infer from the last paragraph that Boris      .

A. still couldn't make good profits      

B. found a lot of gold coins by accident

C. set off in a successful career  

D. had great difficulty running his business

题型:选择题

女,20岁。突发下腹疼痛l天急诊来院。否认性生活史,月经规律。直肠指诊扪及下腹肿物如拳头大小,触痛明显。急诊行剖腹探查术,术中见左侧卵巢肿大为囊实性包块,包膜完整。右侧附件及子宫外观无异常。行患侧附件切除术,快速病理示左卵巢未成熟畸胎瘤,分化Ⅱ级,腹腔冲洗液未查见癌细胞。

该患者应选择的手术方式()

A.患侧附件切除术

B.双侧附件切除术

C.患侧附件切除术+保留生育功能的分期手术

D.患侧附件切除术+阑尾切除术

E.子宫+双附件切除术

题型:选择题

历史上第一部注解《伤寒论》的著作是

A.《伤寒论集注》

B.《伤寒论直解》

C.《伤寒论诠释》

D.《伤寒论注》

E.《注解伤寒论》

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