问题 选择题

下列关于煤、石油、天然气的说法中不正确的是(  )

A.从煤中获得焦炭、煤焦油、煤气等的过程是化学变化

B.都属于混合物

C.都是蕴藏量有限的、不可再生的能源

D.完全燃烧时对空气不会产生污染

答案

A、从煤中获得焦炭、煤焦油、煤气等的过程是化学变化,故A正确;

B、煤、石油、天然气都含有多种杂质,故属于混合物,故B正确;

C、煤、石油、天然气是动植物的遗体在地壳中经过长期的地质作用形成的,属于不可再生能源,故C正确;

D、充分的燃烧可以减少资源的浪费,减小一氧化碳等物质的产生,而不是完全燃烧时对空气不会产生污染,故D错误.

故选:D.

阅读理解

Canada 4:00 a.m. to 8:00 a.m.

Canada is a big country with six time zones. In the west, it is four a.m., and everyone is asleep, but in Halifax on the east coast it is eight o'clock and people are having breakfast. It is a cold Friday morning in November, and the temperature is ten degrees below zero Centigrade(度).

Argentina 9:00 a.m.

In Buenos Aires, the capital of Argentina, it is nine a.m. on a warm summer morning, and people are starting work or school. November is a summer month in Argentina because it is in the southern hemisphere(半球).

Scotland 12:00 noon

Scotland is part of the United Kingdom. The capital of Scotland is Edinburgh, and the capital of the UK is London. It is twelve noon, or midday, in Edinburgh. Children are having lessons, but they are looking forward to the weekend because there is no school on Saturday and Sunday.

Egypt 2:00 p.m.

Friday is already the weekend in Egypt. Friday is a special day for Muslims, so schools, offices and shops are closed in all Arab countries. So now, at two p.m., most people in Egypt are having lunch with their families.

Japan 9:00 p.m.

Japan is seven hours ahead of Egypt, so it is already Friday evening there. The weekend is beginning. Most people are out with friends or watching television or playing computer games.

New Zealand 12:00 midnight

It is late on Friday night, so most people are asleep. Now Saturday morning is arriving. It is morning in Canada too, but that is Friday morning!

小题1:In eastern Canada, the time is ______ than that in western Canada.

A. four and a half hours later        B. four hours earlier         C. three hours earlier    

小题2:While Canadian children in Halifax are having breakfast, Argentinean children are ______.

A. sleeping                        B. going home                C. having classes   

小题3:It’s midday in the capital of ______ when it’s 9:00 a.m. in the capital of Argentina.

A. Japan                        B. Scotland                      C. New Zealand         

小题4:Now it’s 2:00 p.m. and you are in Egypt. It’s ______ for you to call a friend in New Zealand.

A. impolite                     B. polite                   C. normal

小题5:If it’s 11:15 p.m. in Japan, it’s ______ in New Zealand.

A. 2:15 a.m.                    B. 2:15 p.m.                   C. 1:15 p.m.

单项选择题