催化剂的活性是反映催化剂加快反应速度的性能,活性的高低主要是通过原料转化率的高低来体现。
参考答案:对
项目选址时自然地面坡度不宜大,一般以( )为宜。
A.2°~3°
B.4°~5°
C.6°~7°
D.9°~10°
All else being equal, will the joint profit of an oligopolistic industry most likely be maximized if the: number of firms demand for thein the industry decrease industry’s products is stable()①A. NoNo ②B. NoYes ③C. Yes Yes
A. ①
B. ②
C. ③