A:e2013·f2014<e2014·f2013
B:e2013·f2014=e2014·f2013
C:e2013·f2014>e2014·f2013
D:e2013·f2014与e2014·f2013的大小不能确定
如图表示有氧呼吸过程,下列有关说法正确的是( )
下列有关人体生理活动的叙述,错误的是()
His comprehensive surveys have provided the most _________ statements of how, and on what basis, data are collected.