【单选题】'Refrigerator production in China jumped from 1.4 million units in 1985 to 10.6 million in 1998,' according to David Fridley, a researcher in the Department of Energy's Lawrence Berkeley National Labo...
A.
about refrigerator production in China
B.
about the energy-efficient refrigerator project in China aided by the UN
C.
about the American aid to the Chinese government in environmental protection
D.
about the tremendous increase of China's refrigerator production