当今世界科学技术地区发展的不平衡,由于国与国、地区与地区、集团与集团之间的科技保密而

题型:单项选择题

问题:

当今世界科学技术地区发展的不平衡,由于国与国、地区与地区、集团与集团之间的科技保密而显得更加突出。然而,科学技术的所有发明创造本应是全人类的财富,任何国家、集团或个人都不应该也不可能长期据为已有。
这段话主要支持了这样一种观点,即:

A.应该加强对科学技术的保密工作

B.应该向国外学习先进的科学技术

C.对科学的保密是有限的,迟早都要泄漏出去

D.科学技术是全人类财富,不应该也不可能长期保密

考点:国家公务员行政职业能力测试行政职业能力测试
题型:单项选择题

某课外兴趣小组欲探究铝与盐酸的反应实验中反应速率与哪些因素有关。请填写下列空白:

(1)实验反应原理:________________________________。

(2)实验用品:试管(普通试管和具支试管各一支)、镊子、乳胶管、玻璃导管、水槽、胶头滴管、温度计;稀盐酸(4mol/L)、铝条(片)、水、胶头滴管、温度计。

(3)实验装置 (图中铁架台等夹持仪器略去)

(4)实验方法

①按如图所示连接好实验仪器,检查装置的气密性,具体操作方法是:_________________________。

②取3块铝条加入到试管中,操作方法是__________________。

③在盛有铝条的试管中,加入2mL稀盐酸。

④测量试管中溶液的温度。

⑤收集反应产生的氢气。

(5)数据处理及问题讨论 ①实验结束后,课外兴趣小组成员将产生氢气的体积与时间作了如下的图。

②试判断OE、EF、FG段所收集气体的多少。

OE:_________;EF:_________;FG:_________。

写出这三段时间内产生氢气的速率大小比较(用OE、EF、FG表示),并解释原因速率

大小比较:___________________________。原因:____________________________

题型:单项选择题

关于X线质的叙述,正确的是

A.X线的硬度

B.X线的强度

C.X线的波长越短,X线质越硬

D.常以管电压(k值间接表示X线质

E.常以管电流(m值间接表示X线质

题型:单项选择题

D

The cost of rice is expected to go up in the coming moths, as an improving global economy raises demand, and drought(旱灾) cuts production in countries such as India. Some economists say prices for rice, the main food for the world’s population, could be returning to levels that caused inflation(通货膨胀)fears in much of Asia last year.

Charuk Singhapreecha is dean of the faculty(系)of economics at Thailand’s Kasetsart University, Hesays prices-especially for Thai nice-are being pushed higher by new customers coming into the market after the economic slowdown of the past year. “They expect that the world demand will increase and we expect that the price of rice will increase next year,” Charuk said. “There are many new markets fro the Thai rice and also we still have for our old customers-China, some Arab countries-they will increase the demand.”

Prices on the global market could again near the record of $1,000 a ton set in the middle of 2008. This month, export prices for Southeast Asian rice have jumped from about $550 a ton to more than $650.

Vichai sriprasert, president of the Thai Rice Exporters Association, says further weakness in the US dollar and concerns over drought add to pressure on prices. Market experts say next year India is likely to try to import three million tons of rice-entering the world market for the first time in 21 years-because of a drought.

Vichai also warns that increasing demand for bio-fuels(生物燃料)from grain could reduce food crops, forcing the price of grains higher. “this is very serious. That’s why the price of rice will not go back to the level that we used to see,” Vichai said. “It will have to be raised at a higher level, but I don’t know where.”

The Philippines this week said it is cutting rice imports due to high prices, even though the country lost more than a million tons of grain to typhoons this year. officials from veetnam, a leading export competitor with Thailand, predict prices will reach about $800 a ton by the middle of 2010. This week the Philippines’ National Food Authority offered almost $665 a ton for 600,000 tons of Vietnamese rice.

Economists say higher food prices will only increase the problems faced by the region’s poor, who are highly dependent on rice as a staple food.

63.   Which of the following is NOT true according to Paragraph 1?

A. Drought reduces production of rice in India.

B. Prices for rice were lower all the time in 2008.

C. Rice is a major food for the world’s population.

D. the improving global economy increases the need for rice.

64.   How many reasons did Vichai mention about rice price’s going up?

A.1.                  B.2.                 C.3.           D.4.

65.Why does the Philippines plan to cut rice imports?

A. Because of high prices.                      B. Because of typhoons.

C. Because of civil war.                        D. Because of drought.

66.What’s the best title of the passage?

A. Higher food prices will increase problems

B. There are many new markets for the Thai rice

C. The global economy is improving

D. Prices for rice are expected to rise

题型:单项选择题

首选用于治疗神经衰弱阴虚火旺证的方剂是

A.肾气丸

B.右归丸

C.大补阴丸

D.酸枣仁汤

E.天王补心丹

题型:单项选择题

粘液性细胞的最主要形态特点是()。

A.有粗面内质网

B.有粘原颗粒

C.有高尔基复合体

D.核扁圆形,居细胞基底部

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