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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Passage Two In 1997, devotees of home electronics eagerly awaited the DVD player, a new device that could play movies without videotape, and with greater clarity. It caught on even faste...
A.
die economic realities of its practicality
B.
robust economic growth
C.
economic problems of hi-tech companies
D.
ignorance of the technology
【单选题】DQ 基因区含DQA1、DQB1、DQA2、DQB2和DQB3，其中属于功能基因是（）
A.
A2和B2
B.
A1和B1
C.
A3和B3
D.
A1和B2
E.
A2和B3