已知5a=3,5b=2,则52a-3b=______.
∵5a=3,5b=2,
∴(5a)2÷(5b)3=9÷8=98,
∴52a-3b=98.
故答案为:98.
.
The little boy was found_________in his room the next day.
A.dead
B.die
C.death
D.died
中性酚盐游离碱为小于()。
A.1.0%
B.2.0%
C.1.5%