题干

关于燃料的热值,以下说法中正确的是(   )

A:燃料的热值与燃料的种类有关系,与燃料的质量和燃烧状况无关

B:燃烧1千克某种燃料放出的热量叫这种燃料的热值

C:燃料燃烧时,质量越大,热值越大

D:燃料不完全燃烧时的热值比完全燃烧时的热值小

上一题 下一题 0.0难度 选择题 更新时间:2017-05-25 12:02:00

答案(点此获取答案解析)

A

同类题4

阅读下列短文,从每题所给的A、B、C、D四个选项中选出最佳选项。

(A)

    Yi Jianlian is a popular Chinese basketball player. He entered CBA at the age of 15. In 2005, he became the youngest MVP winner of CBA. From 2007 to 2012, he played in the NBA and spent five seasons there. Now, he will go back to the NBA. He signed a one-year deal(合约) with the Los Angles Lakers.

    He did a good job and that helped him win the honor again. In the Rio Olympic Games, he averaged 20.4 points for China in five games.

 



    You may take buses every day, but do you ever think about painting buses? In Washington, the US, there is such an activity for students. People hold it every year. Last year, it was on Aug.17. Students from 13 high schools competed to paint buses. The buses came from school, churches and some bus companies.

    Last year, the final winner was Avella High School. They painted their bus black with lighter paint to make it look like space. There are many Star Wars characters on the sides of the buses.


    While many Chinese students go abroad to learn Western culture, foreign students come to China. They get close to traditional Chinese culture. This summer,55 students and teachers from Germany came to China and joined a summer camp. They visited several schools in Hefei, Anhui. There they tried to make dumplings and learn calligraphy(书法). To help them know more about China, Chinese students played with them as partners. They led these foreign guests to places of interest.