(1) Since the launch of the online signature message activity of "Salute the national flag and be a moral person", teenagers have expressed their blessings to the motherland. (2) around the theme 1, use rhetoric 1 and literary talent 1.

(1) Summarize the main points of information. Among all the elements of news, title, lead and theme can reflect the main content of news. Students can learn to extract the content of news from the introduction and theme of news. It can be interpreted as "encouraging everyone to salute the national flag, be a moral person and express their blessings to the motherland". (2) As long as it can closely follow the theme, the content design is reasonable, the rhetoric is properly used, the expression is correct, the text is fluent, and the writing is serious.