如图所示,电阻不计的金属圆盘,半径为r,在圆盘边缘的槽内绕有一根很长的轻质绳,绳

题型:问答题

问题:

如图所示,电阻不计的金属圆盘,半径为r,在圆盘边缘的槽内绕有一根很长的轻质绳,绳端吊有一质量为m的物体,圆盘处于磁感强度为B.方向垂直盘面的匀强磁场中,在圆盘中心转轴O与边缘之间接有一个电阻R.现将物体由静止释放,则圆盘绕轴O转动的最大角速度是多少?(不计一切摩擦)

考点:法拉第电磁感应定律
题型:问答题

     If you go to Hong Kong by air, you will arrive at Hong Kong International Airport. This airport

was built out into the sea, because there is not enough land. It is in the part of Hong Kong called

Kowloon. Kowloon is one of the two big cities in Hong Kong.

     The other city is Hong Kong itself. It is on an island. You can get there by ship or through a

tunnel (隧道) under the sea. Much of Hong Kong is farmland and mountains.

     The population (人口) of Hong Kong is over six million. Chinese and English are spoken by

many people. Clothes, computers, radios and TVs are made in Hong Kong. You can buy all kinds

of things, such as watches and computers there.

     People from all over the world travel to Hong Kong every year. You can watch dog-racing or

motor-racing. Some places are quiet and beautiful. When you are tired and hot, there are small

cool gardens to rest in. There are also a lot of hotels to live in. Hong Kong is also a good place for

wonderful Chinese food. You can enjoy many kinds of food, for example, fish, vegetables and famous

Beijing Duck. There is certainly a lot to see and to do in Hong Kong.

1.The airport was built out in the sea because _____.

A. it's near the sea

B. planes can arrive safely

C. land is limited (有限的)

2. Kowloon is _____.

A. the name of a farm

B. a big city under the sea

C. a big city in Hong Kong

3. A lot of people in Hong Kong speak _____.

A. English only

B. Chinese and English

C. neither Chinese nor English

4.There are _____ travelers in Hong Kong every year.

A. many

B. few

C. some

5.The main idea of the fourth paragraph (段落) is that _____.

A. dog-racing is interesting

B. Chinese food is famous

C. Hong Kong is a good place for traveling

题型:问答题

下列有关小说的基本元素表述不正确的一项是(   )

A.当使用第一人称时,叙事者同时也是故事里的人物,他是站在故事内部的参与者角度来讲述故事的,采取的是有限的视角。

B.小说忌讳“主题鲜明”,但所有的作品最终都是有主题的。主题应包孕于形象中,用事实说话,形象大于思想。

C.小说最终要表达的不是某种事实,而是一种具有审美魅力的真实。而艺术的真实与生活的真实有着密切的联系,“虚构与真实,仿佛水消失在水中”,两者很难分辨,所以艺术的真实其实就等于生活的真实。

D.场景就是我们常常说的“场面描写”。它与单纯的环境描写不同,它是以人物为中心的环境描写,一般由人物、事件和环境组成。

题型:问答题

“针脚整齐、紧密柔和、色彩明快、浓淡适度”,这是指( )。

A.粤绣
B.蜀绣
C.湘绣
D.苏绣

题型:问答题

下列关于社会福利的表述正确的是()。

A.社会福利的受益者无须为其得到的服务全额付费,而是可以无偿或低偿获得物质产品或服务

B.社会政策与社会福利这两个概念所指的行动领域是一致的,以至于在许多文献中这两个概念可以互换使用

C.社会福利是指当代社会中为了更好地达到福利目标而实行的非市场化的财富分配制度和公共服务方式

D.从广义上看,“福利”一词常常指一些专门针对特殊困难群体(如贫困者、残疾人、孤寡老人和孤儿等)的社会救济和专门化的服务

E.为了维持其无偿或低偿的分配及服务,福利性项目应该有公共资金支持,而政府的公共财政在社会福利项目中应该承担主要的责任

题型:问答题

骨髓穿刺常选用的部位除了()

A.髂后上棘

B.髂前上棘

C.肋骨

D.腰椎棘突

E.胸骨

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