根据我国现行工程造价构成,属于固定资产投资中积极部分的是( )。
A.建筑安装工程费 B.设备及工、器具购置费C.建设用地费 D.可行性研究费
参考答案:B
When _______ about their opinion of the effect of modern equipment on their performance of tasks, many young people gave a positive response.
A.asked
B.asking
C.being asked
D.to ask
如图所示是一只白炽灯的效率图,根据此图可以知道转化成的内能为_____J ,白炽灯的效率为_____ 。