A:v¯ (NH3)=0.0100mol∙L﹣1∙s﹣1
B:v¯ (O2)=0.0010mol∙L﹣1∙s﹣1
C:v¯ (NO)=0.0010mol∙L﹣1∙s﹣1
D:v¯ (H2O)=0.045mol∙L﹣1∙s﹣1
Mr. Smith thinks running is ________ than swimming.