The artist spent years on his monumental painting, which covered the whole roof of the church, the biggest in the country.

A．archaic

B．sentimental

C．outstanding

D．entire

甲拌磷与乙酰甲胺磷混合对大鼠染毒所产生的联合毒效应，属于（）。

A.相加作用

B.协同作用

C.拮抗作用

D.独立作用

E.加强作用