质量M=2000千克的卡车载水平公路上以12米/秒的速度行驶,车厢底上放着质量m

题型:问答题

问题:

质量M=2000千克的卡车载水平公路上以12米/秒的速度行驶,车厢底上放着质量m=1000千克的重物,重物与底板间的摩擦因数μ=0.5,现卡车突然制动,经2秒后停止运动.求:

1)卡车的加速度;

2)重物在底板上滑行的距离;

3)卡车的制动力.

考点:匀变速直线运动的位移与时间的关系牛顿第二定律
题型:问答题

在分子、原子、原子核、质子、中子、电子等微粒中,找出符合下列条件的微粒,填在相应的横线上:

(1)能保持物质化学性质的微粒是 ______________。

(2)化学变化中的最小微粒是____________。

(3)带正电的微粒是____________。

(4)不显电性的微粒是_____________。

(5)质量最小的微粒是_______________。

(6)在同一原子中数目相等的微粒是_______________。

(7)决定原子质量大小的微粒主要是________________。

(8)质量和氢原子质量近似相等的微粒是_________________。

题型:问答题

男性,65岁。有胸痛一周,活动时加剐,伴乏力、低热,查血象基本正常,血清蛋白电泳在β和γ区带间有M-蛋白,尿本周蛋白阳性

下列最有助于确定本例诊断的是()

A.骨髓涂片异常浆细胞达50%

B.血清免疫球蛋白测定有单株性增高

C.血清钙增高

D.肾功能损害

E.血液粘滞度增高

题型:问答题

某国为避免过度竞争而在某些产业实施进入规制,这属于()。

A.产业政策直接干预手段

B.产业政策间接干预手段

C.产业政策经济干预手段

D.产业政策特殊干预手段

题型:问答题

阅读理解。

     To all of you at Chinese love links,

     I am 44 years old and never married. I have always wanted to find that perfect someone that I dream

about. For about the last five years I have almost given up the hope of ever finding the one I truly wish to

spend the rest of my life with.

     I have always tried to be a nice guy. I had found your website some four or five months before. I did

not know what to expect. I don't know how to speak Chinese and never thought truly of how I was to

an Asian woman.

     Well, I had a lot of replies from some very nice and pretty women. I had a hard time finding only a

couple to write to. But one stood out from the rest. She was cute, nice and seemed to hold a lot of the

same values as I do. In a short time I had decided to write only to her. We communicated via emails 2-3

times a day and phone calls once or twice a week.

     I went and met her and her family only a week ago. Her name is Ying and she lives in Nanning. I

found Nanning to be one of the most beautiful cities I had ever been to. We had even decided to marry

and to bring her to the USA under the fianc?e visa. Not only did she meet everything I had ever hoped to

find in someone else but turned out to be what every woman should be like, at least the ones I have met. We plan to marry as soon as she is here and start a family together as neither of us has children but we

both want them.

     So to anyone out there reading this, I can only say this: You may not find what you are looking for if

you're not honest with your partner and yourself. This site worked for me mostly because I was honest

with something that I wanted in someone else. When I did find her, love can work even across the other

side of the world, between language differences and cultural differences. I wish you all luck in finding

your perfect match. I have finally found mine and wish to give all my thanks to those at Chinese love links

to help make it happen.

Sincerely yours,

Arthur

1. We can infer from the letter that Chinese love links is a website to         .

A. help foreigners to travel in China

B. help both Chinese and foreigners to find one they want to marry

C. help Chinese and foreigners make friends

D. receive letters from the USA

2.Which of the following is true about Arthur's story?

A. He was sure of finding a Chinese woman as his wife at first.

B. He was determined to find a Chinese woman as his wife.

C. He almost lost hope in finding a perfect wife until he found Ying.

D. No women wrote to him before Ying.

3.Ying stood out from the rest because         .

A. she was a Chinese

B. she had much in common with Arthur

C. other women stopped writing to Arthur

D. she was cute and nice and often phoned to Arthur

4. Arthur thinks       is the most important in finding someone one wants to marry.

A. being honest with the partner and oneself

B. help from the website

C. difference in languages and places

D. difference in cultures

题型:问答题

2006年5月,张某从家家商场购买了一台家家欢牌电热水器。同年6月,该热水器因质量问题,漏电造成张某住院治疗,1个月,花费医疗费1万元。同年10月,张某向家家商场提出交涉,要求商场赔偿医疗费。双方协商未果,张某于同年12月向人民法院提起诉讼。那么下列说法,哪个是正确的( )

A.张某仅有权请求家家商场承担侵权责任
B.张某仅有权请求家家商场承担违约责任
C.张某有权请求家家商场承担侵权责任和违约责任
D.张某只能在请求家家商场承担侵权责任或违约责任中选择其一

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