wd and cc

\documentclass{beamer}
 
\mode<presentation>
{
%   \usetheme[blue,noshadow]{Trondheim}
%   \usetheme[blue,minimal]{Trondheim}
%  \usetheme[blue,compress,numbers,nonav]{Trondheim}
%\usetheme[sand,compress,numbers,nonav,innovation]{Trondheim}
%\usetheme[sand,compress,numbers,nonav]{Trondheim}
\usetheme{Berlin}
%\usecolortheme{ntnuold}
\usefonttheme[onlymath]{serif}
\setbeamercovered{transparent}
% 上面这段是使用 beamer 的哪个theme, 具体看 beamer 自带的例子里面的效果吧
}
 
\usepackage{fontspec}
\newfontfamily\zhfont[BoldFont=Microsoft YaHei]{Microsoft YaHei} %设置中文
\newfontfamily\zhpunctfont{Microsoft YaHei} % 设置中文
 
\setmainfont{Consolas}           %这里设置英文衬线字体
\setmonofont{Consolas}                     %英文等宽字体
\setsansfont{Consolas}               %英文无衬线字体
 
\usepackage{zhspacing}
\zhspacing
 
\title{测试标题}
\author{wd}
\institute{XXX Inc.}
\date{\today}
 
\begin{document}
 
\begin{frame}
  \titlepage
\end{frame}
 
\begin{frame}
  \frametitle{摘要}
  \tableofcontents
\end{frame}
 
\section{What do we have}
 
\begin{frame}
	\frametitle{what do we have}
	\begin{itemize}[<+-|alert@+>]
		\item have 1
		\item have 2
		\item have 4
		\item .......
	\end{itemize}
\end{frame}
 
\section{what do we need}
\subsection{need}
\begin{frame}
	\frametitle{what do we need}
	sth...
	\begin{itemize}[<+-|alert@+>]
		\item 1
		\item 2
	\end{itemize} 
	\hfill \\
	else ?...
\end{frame}
 
\subsection{pic}
\begin{frame}
	\frametitle{pic}
	\centerline{\includegraphics[height=6cm]{xx.jpg}}\label{phb}
\end{frame}
 
\section{else}
\begin{frame}
    \frametitle{else}
	\begin{center}\Huge{?}\end{center}
\end{frame}
 
\end{document}