胜利小学四年级学生栽树56棵,五、六年级学生栽树的棵数比四年级的3倍少24棵,求五、六年级栽树多少棵?
56×3-24,
=168-24,
=144(棵);
答:五六年级栽树144棵.
A monument was built _____ those who lost their lives for the foundation of New China. [ ]
A. in place of
B. in memory of
C. instead of
D. in tome of
精馏时,饱和液体进料,其精、提馏段操作线交点为(xF,xF)。