His remarks ________ me in my opinion that he was a very considerate boy.

A．concerned

B．contacted

C．confirmed

D．considered

如图装置进行实验，将液体a逐滴加入到固体b中，下列叙述不正确的是

A．若a为浓盐酸，b为KMnO₄，c中盛紫色石蕊试液，则c中溶液先变红后褪色

B．若a为浓硫酸，b为木炭，c中盛有苯酚钠溶液，则c中出现白色浑浊

C．若a为浓氨水，b为生石灰，c中盛AlCl₃溶液，则c中先产生白色沉淀后沉淀不溶解

D．若a为稀盐酸，b为大理石，c中盛有BaCl₂溶液，则c中溶液不变浑浊