单项选择题

A．A special way to put a message into code so that common people cannot read it.
B．A special way of paying attention to an event that has a major impact on recalling it later.
C．A special way to expand our memory capacity.
D．A special way to slow down the process of losing our memory.
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单项选择题
A．Shanghai’’s small, competitive high-tech companies.B．Shanghai’’s information and biology enterprises.C．Shanghai’’s private enterprises.D．All of the above.
A．Shanghai’’s small, competitive high-tech companies.
B．Shanghai’’s information and biology enterprises.
C．Shanghai’’s private enterprises.
D．All of the above.
单项选择题
A．She wants to find a job in this summer to pay for tuition fees.B．She lives far away from her parents.C．She will have no time to visit her parents in this summer.D．She doesn’’t miss her parents.
A．She wants to find a job in this summer to pay for tuition fees.
B．She lives far away from her parents.
C．She will have no time to visit her parents in this summer.
D．She doesn’’t miss her parents.
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