riversatile on "The same SQL query 99 times on my pages (only pages)"

On my pages (not posts), there are 143 SQL queries !

The following query appears 99 times :
SELECT t.*, tt.* FROM xxx_terms AS t INNER JOIN xxx_term_taxonomy AS tt ON tt.term_id = t.term_id INNER JOIN xxx_term_relationships AS tr ON tr.term_taxonomy_id = tt.term_taxonomy_id WHERE tt.taxonomy IN ('category') AND tr.object_id IN (443) ORDER BY t.name ASC
This is the mess !

Have you got any idea where they can come and what do they do ?

Many thanks for your help.
Riversatile