1. A line $l$ intersects a hyperbola $c$, then the maximum number of intersection points is ( ).
A. 1
B. 2
C. 3
D. 4
一、1. B. The intersection point refers to the solution of the system of equations
$$
\left\{\begin{array}{l}
a x+b y+c=0 \\
\frac{x^{2}}{a^{2}}-\frac{y^{2}}{b^{2}}=1
\end{array}\right.
$$

The solution to such a system of equations has at most two solutions. Therefore, the answer is B.