主语和谓语的单复数需要保持一致,以下表达中存在单复数使用错误的有
A.
The infrared spectra of CQDs was tested.
B.
Different method for the synthesis of graphene has been reviewed in this paper.
C.
In the energy-storage sector, electrochemical energy storage based on the reversible conversion of chemical energy and electrical energy has dominated over two centuries.
D.
The quest to explore and to discover novel cathode materials is key to sustaining the progress of Li-ion rechargeable batteries.