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【单选题】
设全集U={1,2,3,4,5},集合A={1,2},B={2,3,5},则(? U A)∪B=( )
A.
{3,5}
B.
{3,4,5}
C.
{2,3,4,5}
D.
{1,2,3,4}
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【单选题】—I feel tired and sleepy. —Why not stop ____ for a while? [ ]
A.
rest
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to rest
C.
resting
D.
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【单选题】–I feel tired and sleepy. –Why not stop __________?
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to relax
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【单选题】由超声多次发射而引起的伪像叫
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切面厚度伪像
B.
声影
C.
旁瓣伪像
D.
混响
E.
折射声影
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【单选题】---I feel tired and sleepy. ---Why not stop______?
A.
resting
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lying
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D.
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【单选题】Tom asks his mother ______ a computer for him [ ]
A.
buys
B.
bought
C.
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D.
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【判断题】( )西青果是橄榄科植物橄榄的成熟果实,青果是使君子科植物诃子的幼果。
A.
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B.
错误
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【单选题】Tom went into a restaurant to _______ .
A.
buy glasses
B.
have lunch
C.
buy some books
D.
sell glasses
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【单选题】—I feel tired and sleepy. —Why not stop ______? [ ]
A.
to relax
B.
relaxing
C.
resting
D.
to relaxed
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【单选题】由超声多次发射而引起的伪像称为
A.
切面厚度伪像
B.
旁瓣伪像
C.
声影
D.
混响
E.
折射声影
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【判断题】判别分析和聚类分析不同,但往往联合起来使用。
A.
正确
B.
错误
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【单选题】Tom went into a restaurant to _______ .
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buy glasses
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buy some books
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to relax
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【单选题】由超声多次发射而引起的伪像称为
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切面厚度伪像
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【判断题】判别分析和聚类分析不同,但往往联合起来使用。
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