问题 填空题

2011年9月29日,我国成功发射了“天宫一号”卫星.点火后燃气向后高速喷出,运载火箭腾空而起,燃气的________能转化为火箭的________能;运载火箭选用液态氢做燃料,主要是因为液态氢具有较大的_________.

答案

内  机械(或动)  热值

题目分析:(1)火箭升空时的能量转化:燃料的化学能先转化为内能,然后通过内燃机把燃气内能转化为火箭的机械能;

(2)运载火箭采用液态氢作为火箭的燃料,原因是液态氢具有较高的热值,完全燃烧相同质量的氢时,可以释放出更多的热量;

点评:此题考查知识面广,了解能量的转化,利用热值解释生活中的现象,属于综合性的题目.

单项选择题
阅读理解

The Crowne Plaza Copenhagen Towers has been named the greenest one in the world by the travel and tourist organization Skaal International, reported the Danish news agency Ritzau on Monday.

The hotel has been awarded the EcoTourism Award for setting an environmental-friendly example to other hotels, said the report.

The Crowne Plaza Copenhagen Towers is located in the Copenhagen suburb of Oerestad and has the largest solar cell facility in the Nordic. This facility delivers energy to the hotel while Danish groundwater supplies cooling and heating in the air condition of the hotel.

The Crowne Plaza Copenhagen Towers

TV and lights in the hotel are all of energy-saving brands. Shampoo bottles, toothbrushes and washing accessories are biologically degradable, which means that the nature can easily absorb the materials.

The hotel restaurant is only buying local goods and the food leftovers are used for bioenergy as well as fertilizer. The fitness facilities also provide a green touch to the hotel, as the training bikes of the fitness center are linked to the power grid(电网) of the hotel, thereby providing free energy if any guest wishes to exercise. People who do contribute free energy this way are supposedly getting a free meal in the hotel restaurant. “It is the first time that a Danish hotel receives this award. I think our throughout green thinking is the reason why we have been awarded. It is all the small details, as well as the big picture,” says Allan Agerholm, the CEO of the hotel, in a press release.

The Crowne Plaza Copenhagen Towers opened its doors last year. Skaal International was founded in 1932 by travel managers and has approximately 20,000 members in 89 nations. It is an organization promoting global tourism.

小题1:Which of the following is the best title of this passage?

A.Hotel in Copenhagen named world’s greenest

B.Copenhagen-the world’s greenest city

C.Eco Tourism Award in Copenhagen

D.The Crowne Plaza Copenhagen Towers小题2:The hotel has been awarded the EcoTourism Award because         .

A.delivers green energy to the hotels in Nordic

B.is located in the Copenhagen suburb not in the city center

C.has the largest solar cell facility

D.it sets an environmental-friendly example to other hotels小题3:The underlined word “degradable” in passage 3 means it can be         .

A.rejected by people who don’t like it

B.accepted by guests from all over the world

C.absorbed easily by nature

D.recycled by the nature小题4: What is so special about the fitness facilities?

A.It is free for those who like to exercise.

B.It uses green power to drive.

C.It generates free electricity while being used.

D.It offers free meal to guests who use it.小题5: What is Skaal International?

A.Another name for this green hotel.

B.An organization promoting global tourism.

C.The Danish news agency Ritzau.

D.A branch hotel restaurant in Danmark.