C．It is invisible．D．It is wireless．38．One special feature of Crystal Ear is that
A．you can control its volume． B．you needn’t take it off everyday．
C．it is solar-powered． D．it saves power．39．According to the passage，hearing loss is
A．only a minor health problem．B．the world’s most common health problem．C．merely a teenage disease．D．an incurable disease．
40．Many people leave their hearing problem untreated because
A．it is not serious．B．Crystal Ear is not yet available．
C．it is not easy to have it treated．D．they don’t want to look old．
Technology Transfer in Germany
when it comes to translating basic research into industrial success，few nations can match Germany．Since the 1940s，
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