NH4SCN滴定液是用基准物( )来标定的

— I just don’t think zoo is good plce fornimls. Theyre not free in the zoo.— 　　　. But don’t— I just don’t think zoo is good plce fornimls. Theyre not free in the zoo. — ____. But don’t you think the zoo looksfternimls well I don’tgree B．I don’t think so C．You must be joking D．Mybe you’re rightA．I don’t agreeB．I don’t think soC．You must be jokingD．Maybe you’re right