A table of contents appears at the beginning of almost every book, and it helps you find your way through the book. It usually gives a list of chapters or article titles and page numbers on which each chapter or article can be found.

Here is a paragraph on global warming. Read the paragraph and then study the table of contents to answer the questions.

Global warming has gone from science fiction to science fact in only 20 short years. Now, climate scientists are becoming very worried about warm weather melting Arctic ice. If the Arctic ice melts completely, it will add lots of water to the world's oceans. The additional volume will cause water levels to rise all around the world. Melting Arctic ice will also change how goods are transported worldwide. The ice in northern Canada is melting earlier every year, and ships are starting to take advantage of a quicker route between the Atlantic and Pacific Oceans. This new Arctic shipping route is called the Northwest Passage.

目錄幾乎都放在每本書的起始處，幫助你找到書中你所需要的資料。目錄通常會列出章節文章的標題，以及可以找到每個章節或文章的頁碼。

以下是一篇關於全球暖化的短文。閱讀短文，然後研讀它的目錄來回答問題。

短短二十年的時間，全球暖化現象已從科幻電影情節，成為真實上演的科學事實。如今，氣候專家越來越擔心天氣暖化問題會使北極冰層融化。假如北極冰層完全融化，就會增加全球海洋的水量，進而造成全球海平面上升的問題。北極融冰問題也會改變全球貨物運輸的方式。加拿大北部的冰層每年均提早融化，因此船隻開始利用大西洋與太平洋之間更快的航道。這條嶄新的北極貨運路線稱為「西北航道」。