What does the absence of punctuation mean in line such as these from ''train train''

In a two-dimensional art form, the actual flat surface on which the work is executed is called the:

Which description is most accurate of fine, thin hair?

Which is a feature of balance in design

Which of the following has the largest aperture opening? f/1.8 f/2.8 f/4 f/5.6

When did the symphony first emerge as a musical form?

3. Outline the duties of the costume crew during dress rehearsals and performances.

Whats the relation between cost per yard and run length?

What day did singer Jerry Wood die?

Which statement about the Chrysler building by william van alen is true? 1. It has the sleek lines and geometric shapes of Art Deco. 2. The setbacks have features of Ford cars. 3. The top is covered with bronze. 4.

Tell why Bill Gates bought da Vinci's Codex Leicester for $30 million