Determine the bond type that is formed in the chemical compound containing element Tellurium.
Tellurium refers to element = 'te'; double bond refers to bond_type = ' = '; single bond refers to bond_type = '-'; triple bond refers to bond_type = '#';
SELECT DISTINCT T2.bond_type FROM atom AS T1 INNER JOIN bond AS T2 ON T1.molecule_id = T2.molecule_id WHERE T1.element = 'te'