To make sure that relics in he museum are well preserved, Tibet's cultural preservation

institutions have ________ modern technologies to monitor the conditions of the relics.  [ ]

A. adapted          

B. applied        

C. appointed            

D. abolished    

当水中含有溶解氧与游离二氧化碳时，会增加水中的（）量，加速腐蚀。

A、氢离子

B、氢氧根离子

C、碳酸氢根离子

D、碳酸根离子