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【简答题】
设有向量组 ,证明 构成 的一组基,并求向量 在这组基下的坐标.
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【单选题】The vegetables in his field ________ well, because they are pollutionfree.
A.
are selling
B.
have been sold
C.
are sold
D.
sell
【单选题】As regards social conventions, we must say a word about the well known English class system. This is an embarrassing subject for English people, and one they tend to be ashamed of, though during the p...
A.
who were born as aristocrat
B.
who have the right to sit in the House of Lords
C.
who speak in many different local accents
D.
who are prosperous businessmen or who work in some professions
【单选题】Although he was a green hand in the research field, he succeeded ______ other more well-known experts failed. [ ]
A.
which
B.
that
C.
what
D.
where
【单选题】As regards social conventions, we must say a word about the well-known English class system. This is an embarrassing subject for English people, and one they tend to be ashamed of, though during the p...
A.
who were born as aristocrat
B.
who have the right to sit in the House of Lords
C.
who speak in many different local accents
D.
who are prosperous businessmen or who work in some professions
【简答题】The well-field system regulated that the field could be only allowed to be used but not .
【单选题】As regards social conventions, we must say a word about the well-known English class system. This is an embarrassing subject for English people, and one they tend to be ashamed of, though during the p...
A.
who were born as aristocrat
B.
who have the right to sit in the House of Lords
C.
who speak in many different local accents
D.
who are prosperous businessmen or professionals
【单选题】The vegetable looking fresh in his field ______well. It’s often sold out immediately it appears in the market.
A.
has sold
B.
has been sold
C.
is sold
D.
sells
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