比x多20的数是5的多少倍?
(x+20)÷5
=x5+4
答:比x多20的数是5的x5+4倍.
By accident, he _______he had done something wrong and that he hadn’t been prison for a few weeks.
A.let out
B.made out
C.made sure
D.took care
铸造时石膏类包埋材料的加热温度必须在
A.500℃以下
B.600℃以下
C.700℃2以下
D.1 000℃以下
E.1 200℃以下