—____ ( What time / When ) do you have a football class?
—On Tuesdays.
直角三角形的三条边长构成等差数列,则其最小内角的正弦值为( )
②2H2(g)+SO2(g)═S(g)+2H2O(g)△H=+90.4kJ/mol
③2H2(g)+CO(g)═CH3OH(g)△H=﹣90.8kJ/mol
请回答:
Mr. Zhang is mad at the children who often copy others' homework.