The（）of a material is a measure of the magnitude of an induced thermoelectric voltage in response to a temperature difference across that material. 正确答案：thermopower

Hydrogen fuel is a（）fuel which uses electrochemical cells, or combustion in internal engines 正确答案：zero-emission

Fuel cells are different from batteries in that they can produce alternating current　continually. A.正确B.错误 正确答案：错误

Typically metals have larger thermapowers than semiconductors. A.正确B.错误 正确答案：错误

Metal hydrides, with varying degrees of efficiency,　can be used as a storage medium for hydrogen, often reversibly. A.正确B.错误 正确答案：正确

A solar cell is an electrical device that converts the energy of light directly into direct current. A.正确B.错误 正确答案：正确

Li-ion batteries use an metallic lithium compound as the electrode material。 A.正确B.错误 正确答案：错误

A photoelectronic materials can（）optoelectronic signals. A.produceB.transformC.transmitD.save 正确答案：produce；transform；transmit；save

Nanoscience is the study of phenomena and manipulation of materials at（）scales, where properties differ significantly from at large scale. A.atomicB.molecularC.macromolecularD.crystalline 正确答案：atomic；molecular；macromolecular

According the type of electrolyte they use, the fuel cells are devided into（） A.AFCB.PAFCC.PEMFCD.MCFCE.SOFC 正确答案：AFC；PAFC；PEMFC；MCFC；SOFC

The fuel cells consist of（） A.an anodeB.a electrodeC.a cathodeD.a electrolyte 正确答案：an anode；a cathode；a electrolyte

Which of the following are the advantages of lithium ion batteries（） A.portableB.the best energy densitiesC.significant memory effectD.a slow loss of charge when not in use 正确答案：portable；the best energy densities；a slow loss of charge when not in use