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【单选题】
若行列式 则A.
2
B.
-2
C.
3
D.
-3
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反馈参考答案：
举一反三
【单选题】While my grandfather is something of a computer expert, my grandmother is a computer illiterate.
A.
during the time that sth is happening
B.
at the same time as sth is happening
C.
as long as
D.
used to contrast two things
【单选题】While my grandfather is something of a computer expert, my grandmother is a computer illiterate.
A.
During the time that sth is happening
B.
At the same time as sth is happening
C.
As long as
D.
Although
E.
Whereas
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