单项选择题

Einstein’’s theory of relativity seemed (incredible) when it was first introduced.

A．brilliant
B．complicated
C．unbelievable
D．distinguished
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单项选择题
I have a (permanent) job here.
A．new
B．high-paid
C．stable
D．temporary
单项选择题
Through a procedure known as time-sharing, one large computer can be employed (simultaneously) by lots of small users.
A．ahead of time
B．all the time
C．at the same time
D．in time
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