汽油的热值是4.6×10⁷J/kg，则完全燃烧0.1kg汽油放出的热量是____ J。

一国综合国力中起决定因素的是  （    ）

日常生活中用到的下列物质，其中属于纯净物的是

完形填空

    The 2013 Talent Show in our school was a night to remember! It was a great1Students, parents and teachers2, sang and played instruments. There were more than thirty3. Our English teacher Jason Cruise4an English song. He won the prize 5 the best performer. 6a reporter from our school magazine interviewed him, he said that singing was7important to him. The prize for the funniest act8to Paul Black, because he danced like a drunken (喝醉的) man without music. And his classmates said he was the9boy in the class.

    Many thanks to the parent and the student volunteers. They made this10show possible. Many thanks to all of the people who helped.