以下是两个不同的代码片段。
代码{\it{}}似乎只正确地将括号内的文本斜体化。当我使用\it{}它时，文档的其余部分也变为斜体。这是为什么？
{\it{}}带有代码和示例
\item Determine whether the following is {\it{always true, sometimes true}}, or {\it{never true}}. Explain.
\begin{enumerate}
\item $\vec{a}(t)$ is perpendicular to $\vec{N}(t)$.
\item $\vec{a}(t)$ is perpendicular to $\vec{r}(t)$.
\item $\vec{v}(t)$ is perpendicular to $\vec{r}(t)$.
\end{enumerate}
输出
\it{}带有代码和示例...
\item Determine whether the following is \it{always true, sometimes true}, or \it{never true}. Explain.
\begin{enumerate}
\item $\vec{a}(t)$ is perpendicular to $\vec{N}(t)$.
\item $\vec{a}(t)$ is perpendicular to $\vec{r}(t)$.
\item $\vec{v}(t)$ is perpendicular to $\vec{r}(t)$.
\end{enumerate}
my favorite text.
输出
