申请美国签证需要提供行程单，行程单是指申请人在美国逗留期间的旅游计划，包括旅游地点、时间、住宿等信息。

下面是一份可以参考的行程单：

Day 1: Arrival in New York City

Upon arrival in New York City, we will check into the Hilton Times Square hotel. We plan to spend the afternoon exploring Times Square and the surrounding area.

Day 2: Statue of Liberty and Ellis Island

We will take a ferry to visit the Statue of Liberty and Ellis Island, where we will learn about the history of immigration to the United States. Afterward, we will explore the Financial District and Wall Street.

Day 3: Central Park and the Metropolitan Museum of Art

We will spend the day in Central Park, enjoying a picnic lunch and taking a leisurely walk around the park. In the afternoon, we will visit the Metropolitan Museum of Art to see its impressive collection of art and artifacts.

Day 4: Washington, D.C.

We will take a train from New York City to Washington, D.C., where we will visit the White House, the National Mall, and the Smithsonian museums.

Day 5: Arlington National Cemetery and Mount Vernon

We will visit Arlington National Cemetery, where we will pay our respects to those who have served in the United States Armed Forces. Afterward, we will visit Mount Vernon, the home of George Washington.

Day 6: Niagara Falls

We will fly from Washington, D.C. to Buffalo, New York, where we will visit Niagara Falls. We plan to take a boat tour of the falls and explore the surrounding area.

Day 7: Departure from New York City

We will return to New York City and depart for our home country.

以上是一份典型的美国旅游行程单，包括了纽约市、华盛顿特区和尼亚加拉瀑布等著名景点。

此外，旅客还可以根据自己的兴趣爱好和时间安排，增加或减少行程内容。

在填写行程单时，需要注意提供详细的信息，包括旅游地点、住宿信息、交通方式等。同时，行程单需要与旅游计划相符，避免出现虚假信息，以免影响签证申请的结果。