Two building workers got seriously wounded when the stadium _______.

A．was built

B．was being built

C．built

D．is being built

某男性铅作业工人，除尿铅增高外，具有神经衰弱症状，口内有金属味，尿ALA升高，可诊断为

A．铅吸收

B．铅中毒

C．轻度铅中毒

D．中度铅中毒

E．重度铅中毒