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【单选题】
在interp2格式:z=interp2(x0,y0,z0,x,y,'method')中,对x和y的要求是:A.
x是列向量，y是行向量
B.
x是行向量，y是行向量
C.
x是行向量，y是列向量
D.
x是列向量，y是列向量
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举一反三
【简答题】完形填空。 In many countries old age is a happy time, but in the United States it is quite 1 for old people. Most old people do not live with their children or relative. If they 2 enough money, they buy ho...
【单选题】A man has to make ______ for his old age by putting aside enough money to live on when old.
A.
supply
B.
assurance
C.
provision
D.
storage
【单选题】It is true that______.
A.
old age is the worst age
B.
only old people are able to give wise advice
C.
a wise old man may live happily
D.
an old man who has joined in battles can live happily
【单选题】The passage is mainly about ______.
A.
the effects of old age on health
B.
old people
C.
people's fear of getting old
D.
old people's diseases
【单选题】A man has to make ______ for his old age by putting aside enough money to live on when old.
A.
supply
B.
assurance
C.
provision
D.
adjustment
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