水管锅炉换热效果好原因是受热面采用细管和烟气横向冲刷管来。
参考答案:对
Film has a much shorter history, especially when _____ such art forms as music and painting.
A.having compared with
B.comparing with
C.compare with
D.compared with
“意识一开始就是社会的产物,而且只要人们还存在着,它就仍然是这种产物”,这是( )的一种观点。
A.朴素唯物主义
B.庸俗社会学
C.辩证唯物主义
D.形而上学唯物主义