
30.D【解析】作出推理判断。根据第三段“And as thenew technology is not large like its predecessors(前身),it has many future applications”可知,它的前身的功能要少得多。故选D项。
31.A【解析】作出推理判断。根据最后一段中“Whilethis is the first proof-of-concept experiment,we areactively working to further advance the technology”可知,他们在积极的推进这种技术。故选A项。