答案:C
![](https://solvingmaster.space/wp-content/uploads/2023/06/2007PaperII15_fig01-300x284.png)
$\begin{array}{rcl}
\alpha + 110^\circ & = & 180^\circ \\
\alpha & = & 70^\circ
\end{array}$
所以,由 $A$ 測 $B$ 的方位
$\begin{array}{cl}
= & 360^\circ – 70^\circ \\
= & 290^\circ
\end{array}$