Six and six is____
当黑龙江还是冰天雪地时,海南岛已是春耕大忙了,这是由于我国( )
The doctor had almost lost hope at one point, but the patient finally ______.
小肠严重吸收不良病人,采用静脉输入全营养液的方法提供营养,全营养液的组成成分不能含有( )