252158=______万;149600000=______亿.
252158=25.2158万;
149600000=1.496亿;
故答案为:25.2158,1.496.
灯泡L1和L2连接在同一个电路上,在1 s内通过灯泡L1的电荷量是0.3 C,在1 min内通过灯泡L2的电荷量是6C,则灯泡L1的电阻值与L2的电阻值之比R1:R2为_____________。
Many children, __parents are away working in big cities, are taken good care of in the village.
A.that
B.whose
C.which
D.whom