A good research paper title often involves the following characteristics ：

A.predicting content, arousing interest, reflecting the tone of writing and containing key words.

B.predicting key words, arousing interest, reflecting the tone of writing and containing content.

C.predicting the tone of writing, arousing interest, reflecting content and containing key words.

D.predicting interest, arousing the tone of writing , reflecting　content and containing key words.

正确答案：predicting content, arousing interest, reflecting the tone of writing and containing key words.