若a<b<0,则下列各式中一定成立的是( )
A:1a<1b
B:ab<1
C:ab>1
D:ab<1
佛教主要分布在( )
We believe the public services in our city are good, and we are working hard to make it even .
将灯L1、L2串联在电路中,灯L1较亮,灯L2较暗,原因是R1>R2,则通过这两盏灯的电流和灯两端的电压的关系,正确的是( )