（） can include a general topic in the first part and a specific topic about a distinctive feature of the study in the second part, which are often connected by a colon.

（） can include a general topic in the first part and a specific topic about a distinctive feature of the study in the second part, which are often connected by a colon.
A.Nominal titles
B.V-ing titles
C.Two-part titles
D.Full-sentence titles
正确答案：Two-part titles