Such as the statistics of story books, science and technology books and comic books in the experimental primary school library. (1) This is _ _ _ _ _ statistics. (2) Science and technology books.

(1) This is a vermicelli diagram;

(2) 1-45%-30%=25%,

A: Comics account for 25% of all books;

(3) Total number of books: 2 16÷30%=720 (book)

Comics: 720×25%= 180 (volume)

A: There are 2 16 story books, so there are 180 comic books.

(4)360×30%= 108 (degrees)

Answer: It represents the fan-shaped part of the story book, and its central angle is 108 degrees.

(5)(30%-25%)÷25%

=5%÷25%

=20%

A: The number of story books is 20% more than comic books.

So the answers are: (1) sector, (2)45, (3) 180, (4) 108, (5) 20.