甲种糖每千克3元，乙种糖每千克5.4元，现在要求混合后的糖价为每千克4.8元。试求混合时甲、乙两种糖的质量比。
（5.4-4.8）：（4.8-3）=1：3
Three weeks after the suicide bombing, the police were still hunting for bombers for they believe more were ______.
A．on the verge
B．on the sly
C．on the spot
D．on the loose
简述人体形体美是通过几个阶段逐步达到应有的目标和效应。
