My brother spends one hour every day.
Andreas Kern and Paul Cibis are famous artists from ____(德国).
实验组别
光照时间(s)
14C分布
1
2
大量3﹣磷酸甘油酸(三碳化合物)
20
12种磷酸化糖类
3
60
除上述12种磷酸化糖类外,还有氨基酸、有机酸等
如图,下列条件中,不能判断直线l1∥l2的是( )
He asked his father _______.