1. Given the set $A=\{0.1,1,10\}, B=\{y \mid y=\lg x, x \in A\}$, then $A \cap B=(\quad)$.
A: 1
B:
$\{1\}$
$\mathrm{C}: \varnothing$
D: 0
Ronggui B.
Analysis Given $A=\{0.1,1,10\}$, it is easy to know that $B=\{-1,0,1\}$, so $A \cap B=\{1\}$.