【单选题】根据氮平衡指标,青少年的氮平衡应( ) 。
【简答题】阅读理解。 Hello! I'm Rain. It's my English name. My Chinese name is Zheng Zhixun. But I'm not Chinese. Zheng is my family name. Zhixun is my first name. I love blue. Hi, boys and girls. Sophie is my first...
【单选题】根据氮平衡指标,青少年的氮平衡应 ( )
【单选题】Hello! My name’s Alan Miller.