.When he was a boy, he used to go there and watch _____.

A．to repair bicycles

B．bicycles to be repaired

C．bicycles being repaired

D．repairing bicycles

考虑尿石症时，为明确诊断，最需做哪项检查

A．尿细菌培养+药敏

B．放射性核素肾图

C．肾功能检查

D．KUB+IVP

E．CT检查