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【单选题】
正交变换DFT是()的简称。A.
离散叶级数
B.
离散余弦变换
C.
离散叶变换
D.
快速叶变换
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皮皮学刷刷变学霸
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【简答题】当采用1:1000的比例绘绘图时,比例尺上的1mm代表实际长度为
【单选题】According to the writer, forecasting is fairly accurate in ______.
A.
politics
B.
science
C.
sociology
D.
economy
【单选题】My English teacher is busy, __________ she always finds time to visit her parents.
A.
and
B.
so
C.
but
D.
or
【单选题】According to the writer, when man finds it impossible to live together with other species, he usually______.
A.
tries to communicate with them
B.
tries to teach them a language
C.
sets up a relationship with them
D.
wipes them out
【简答题】当采用1：1000的比例绘图时，比例尺上的1mm代表实际长度的（）
【单选题】In the first paragraph the writer emphasizes the __________ of face-to-face contact in social settings.
A.
nature
B.
limitation
C.
usefulness
D.
creativity
【单选题】When filling up forms, the writer frequently finds that he ______.
A.
can only remember his age and birthplace
B.
doesn't remember who he is
C.
has forgotten some essential facts
D.
is afraid to answer the questions
【简答题】当采用1:1000的比例绘图时,比例尺上的1mm代表实际长度为 。
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