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【单选题】
数码相机是扫描仪之外的另一种重要的图像输入设备,它能直接将图像信息以数字形式输入电脑进行处理。目前,数码相机中将光信号转换为电信号使用的器件主要是A.
Memory Stick
B.
DSP
C.
CCD 或 CMOS
D.
A/D
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举一反三
【单选题】Some people waste food，________other people haven’t got enough to eat.
A.
when
B.
until
C.
since
D.
while
【单选题】Some people waste a lot of food others in the world haven’t enough to eat.
A.
． after
B.
． when
C.
． as
D.
． while
【单选题】Some people waste food, ___________ others haven't enough.
A.
as
B.
while
C.
which
D.
where
【简答题】Some people oppose the building of flats because ________. A) the living expenses for each individual family are higher B) it involves higher cost compared with the building of houses C) they believe ...
【单选题】This article shows that ______.
A.
some people are trying to solve their waste problems
B.
the government is not concerned with the problem of wastes
C.
recovered materials won't be able to compete with new materials
D.
citizens will unwillingly pay the costs of changing the waste system
【单选题】People in some countries waste water______ people in others don’t have enough to drink.
A.
while
B.
because
C.
if
D.
so
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