女生比男生多15%,男生比女生少3人.男、女生各多少人?
3÷15%=20(人),
20+3=23(人),
答;男生有20人,女生有23人.
A British official said that_____ this impractical policy could be changed , the future for Britain was indeed dark.
A.unless
B.when
C.if
D.until
为什么烧嘴冷却水压力比气化炉压力低?