When asked about his happiness, Baoqiang said that if he could afford _________ house, he would feel he was really _________ success.

A．/, a

B．/, the

C．a, a

D．a, /

劳动卫生学的主要任务是

A．识别、评价和控制不良劳动条件
B．识别职业性有害因素
C．早期诊断、治疗和预防职业病
D．提高劳动生产率
E．提高劳动卫生科学水平