My grandpa would like              the radio.

A. to listen    B.to listen to    C. listening to

水标法检定标准体积管,体积管应有铭牌,铭牌上应注明制造厂名、产品名称及型号;制造年、月、日;出厂编号;公称通径、公称流量、准确度等级;防爆等级及防爆合格证编号