这是我的全部文档：
\documentclass[12pt]{article}
\usepackage[margin=1in]{geometry}
\usepackage{xurl}
\usepackage{hyperref}
\usepackage[swedish]{babel}
\usepackage{parskip}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\begin{document}
\begin{titlepage}
\title{Refenssystemet IEEE}
\author{MTAC20h}
\date{October 2020}
\end{titlepage}
\begin{thebibliography}{9}
\bibitem{1} R. Grahn och P. Jansson, \textit{Mekanik : statik och dynamik}, upplaga 3.,
Polen: Studentlitteratur AB, 2013. [Online]. Tillgänglig:
\url{https://www.smakprov.se/smakprov/?isbn=9789144085784&l=bokus},
Hämtad: Okt 04, 2020.
\bibitem{2} M. van Biezen, Professor, ``Mechanical Engineering: Centroids and Center of Gravity (6 of 35) Center of Gravity of a Semi Circle,''
\textit{Youtube}, 2015. [Video]. Tillgänglig:
\url{https://www.youtube.com/watch?v=jkm8TbUt5H4},
hämtad: 2020-10-04.
\bibitem{3} Studentliterattur, ``Mekanik: statik och dynamik: a) Masscentrum, statisk moment,`` 2013. [Elektronisk bild]. Tillgänglig: \url{https://www.smakprov.se/smakprov/?isbn=9789144085784&l=bokus}. Hämtad: 2020-10-06.
\bibitem{4} TED-Ed, Producent, ``An athlete uses physics to shatter world records - Asaf Bar-Yosef,`` \textit{Youtube}, 2014. [Video]. Tillgänglig: \url{https://www.youtube.com/watch?v=RaGUW1d0w8g}, hämtad: 2020-10-02.
\end{thebibliography}
\end{document}
我尝试使用 \newpage 和 \cleardoublepage 之类的代码来查看是否有帮助，但没有效果。
答案1
\maketitle您的环境末尾缺少命令title。
\documentclass[12pt]{article}
\usepackage[margin=1in]{geometry}
\usepackage{parskip}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{hyperref} % <== this should be the last package to be loaded!
\begin{document}
\begin{titlepage}
\title{Refenssystemet IEEE}
\author{MTAC20h}
\date{October 2020}
\maketitle
\end{titlepage}
\end{document}