在标准状况下,如果5.6L氧气含有2n个氧原子,则阿伏加德罗常数可表示为 [ ]

题型:选择题

问题:

在标准状况下,如果5.6L氧气含有2n个氧原子,则阿伏加德罗常数可表示为 [ ]

A.

B.

C.8n

D.4n

考点:阿伏加德罗常数
题型:选择题

Ⅱ型干扰素的主要活性是()

A.抗病毒

B.免疫调节

C.抗肿瘤

D.免疫排斥

E.抗感染

题型:选择题

脑血栓形成的最常见病因()

A.休克

B.风湿性瓣膜病

C.脑动脉粥样硬化

D.先天性脑动脉瘤

E.与上呼吸道感染有关

题型:选择题

自给供水系统工作时,应随时观察()电源控制箱的工作状况,在自动停止工作时,应切断控制箱电源。

A、水泵

B、压缩机

C、增压泵

D、油泵

题型:选择题

The income gap between China's rural and urban residents(居民) has continued to widen during the past few years in spite of rapidly rising rural incomes, Agricultural Minister Sun Zhengcai said here on Wednesday.

The income ratio(比率) between urban and rural residents was 3.28:1 in 2006, against 3.23:1 in 2003, said Sun in his report on the promotion of building a new countryside in 2007. Sun also said the net income of rural residents in different regions also varied widely. The income gap is only one of several problems in rural areas, according to Sun's report. While listing the achievements in rural areas in recent years, Sun believed that rural development still followed behind urban development.

"We have bigger pressure to ensure the supply of major agricultural products such as grain," he said. "China's urbanization(都市化) has been speeded up and more rural residents have gone to urban areas," he said.

"In this case, more agricultural producers become farm produce consumers, which created more pressure for supply," he said.

Another problem facing China's agricultural development is inadequate application of science and technology.

"Only 30 percent of scientific and technological achievements have been applied to agricultural production, which is 40 percentage points lower than developed countries," he said.

Despite increased government spending in rural areas, the infrastructure(基础下部组织) is still poor and easily hit by disasters.

According to Sun, the government spent 431.8 billion yuan ($59.15 billion) on agriculture, rural areas and farmers this year, an increase of 80.1 billion yuan over the previous year.

China set aside 11.38 billion yuan to promote a new rural cooperative medical care system and 27.98 billion yuan to support the new compulsory education mechanism in rural area to ensure that all citizens shared the fruits of China's reform and opening-up, Sun said.

小题1:Which of the following is TRUE according to the text?

A.Because of the rapidly rising rural incomes, the income gap between China's rural and urban residents will disappear this year.

B.The net income of rural residents in different regions is the same.

C.The government has taken measures to develop the economy in the rural areas.

D.Because of the rapidly rising rural incomes, the supply of major agricultural products is enough.小题2:Can you infer the meaning of the underlined words in paragraph 5?

A.be made full use of

B.be made little use of

C.be not made full use of

D.be made good use of小题3:How much is spent on agriculture, rural areas and farmers the previous year?

A.431.8 billion yuan

B.511.9 billion yuan

C.351.7 billion yuan

D.80.1 billion yuan小题4: Which is NOT the problem in rural areas?

A.The income gap

B.The inadequate application of science and technology

C.The supply of major agricultural products

D.China's urbanization

题型:选择题

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