A:y1>y2
B:y1<y2
C:当x1<x2时,y1<y2
D:当x1<x2时,y1>y2
分子相同,分母越____分数越____,分母越____分数越____
______Christmas coming near, they began to be busy shopping for the holiday.
下列各式中,不是整式的是( )
高尔基说:“智慧是珠宝,如果用谦虚谨慎镶边,就会更加绚烂夺目。”这表明( )