Peter likes pop music, but ________ his father ________ his mother likes it.
A:both, and
B:not only; but also
C:neither; nor
D:either, or
甲、乙、丙三人环湖跑步锻炼,同时从湖边一固定点出发,乙、丙二人同向,甲与乙丙反向,在甲第一次遇上乙后1.25分钟第一次遇上丙,再经过3.75分钟第二次遇乙.已知甲速遇乙速的比是3:2,湖的周长是2000米.求甲、乙、丙三人的速度每分钟各是多少米?
下列关于实验操作步骤的叙述,正确的是
若1a<1b<0,则下列结论不正确的是( )