当列车以下列哪种速度运动时,物体收缩效应最大()A、1000000米每秒B、1000

题型:单项选择题

问题:

当列车以下列哪种速度运动时,物体收缩效应最大()

A、1000000米每秒

B、100000米每秒

C、10000米每秒

D、1000米每秒

考点:物理学物理学史物理学史题库
题型:单项选择题

今年我国西南部地区遭遇百年未遇的特大干旱,截止3月31日,受旱面积达116000000亩,这个数据用科学计数法表示为 [ ]

A.11.6×107

B.1.16×108

C.1.16×107

D.0.116×109

题型:单项选择题

男性患者,40岁。因发热、咽痛、头痛,伴腰痛、眼眶痛4天入院。体温在39~39.8℃之间波动。入院体检:T39.5℃,R30次/分,P110次/分,BP80/45mmHg;面部潮红,颈部、上胸部皮肤潮红,球结膜水肿,软腭有出血点,腋下和胸背部、腹股沟皮肤见出血点、瘀点;双肺未闻及啰音,心律齐;腹平软;双肾区轻叩击痛;肝脾未触及。

化验:血常规WBC11.5×109/L,中性90%,血小板65×109/L,BUN9.8mmol/L,Cr360μmol/L,尿常规:蛋白(++),余无异常。最可能的诊断为()。

A.急性上呼吸道感染

B.急性肾炎

C.肾综合征出血热

D.钩端螺旋体病

E.伤寒

F.霍乱

题型:单项选择题

阅读理解。

     On October 19, 1959, the first Special English program was broadcast on the Voice of America. It was

an experiment. The goal was to communicate by radio in clear and simple English with people whose native

language was not English. Experts said the goal was admirable (令人敬畏的), but the method would not

work. They were proved wrong. The Special English programs quickly became some of the most popular

on VOA. And they still are.

     Forty years later, Special English continues to communicate with people who are not fluent in English.

But during the years its role has expanded. It also helps people learn American English. And it provides

listeners, even those who are native English speakers, with information they cannot find elsewhere.

     Today, Special English broadcasts around the world seven days a week, five times a day. Each half-hour

broadcast begins with 10 minutes of the latest news followed by 20 minutes of feature programming. There

is a different short feature every weekday about science, development, agriculture and environment, and on

the weekend, about news events and American idioms.

     Three elements make Special English unique. It has a limited vocabulary of 1,500 words. Most are simple

words that describe objects, actions or emotions. Special English is written in short, simple sentences that

contain only one idea. And Special English is spoken at a slower pace, about two-thirds the speed of Standard

English. This helps people learning English hear each word clearly. It also helps people who are English

speakers understand complex subjects.

     Through the years, Special English has become a very popular tool for teaching English, even though it

was not designed as a teaching program. It succeeds in helping people learn English in a non-traditional way.

In countries around the world, English teachers assign Special English to their students. They praise it for

improving their students' ability to understand American English and for the content of the programs.

Universities and private companies in many countries produce packages of Special English materials for

students' use.

1. At the beginning, Special English program was _____.

A. well received

B. rejected by native people

C. doubted by some professionals

D. intended for teaching English

2. Which of the following are the elements that make Special English unique?

    a. limited vocabulary

    b. short simple sentences

    c. good communication method

    d. slow speed

    e. interesting feature programming

A. a, b, e

B. a, c, d

C. a, b, d

D. b, d, e

3. Which of the following statements is TRUE?

A. Special English has been founded for less than 50 years.

B. Native English speakers don't go in for Special English much.

C. Special English usually starts with 20 minutes of the latest news.

D. People can learn some idioms from Special English.

4. From the last paragraph we can infer that _____.

A. Listening to Special English can be a student's homework

B. Listening to Special English can improve the content of the program

C. Some students record the Special English material for sale

D. Learning English from VOA is a traditional way for English learners

题型:单项选择题

报关企业如果同时经营国际货物运输代理或国际运输工具代理等业务,下列拥有审批其经营权的机关是( )。

A.商务部

B.对外贸易促进会

C.海关总署

D.外经贸主管部门或交通主管部门

题型:单项选择题

装机时,应先洗手或摸一下其他金属物品,这是为了避免()。

A、静电损伤元件

B、触电

C、污染元件

D、元件被磁化

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