This is 3-D printer. And this is an artificial (人工的) ear. Can you believe that scientists printed this artificial ear by this 3-D printer?
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a
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an
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the
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推荐题目
---Is Mr. Xi Jinping _______ honest and capable man?---Yes. And that is why he was chosen to be _______ president of our country.
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a; a
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an; the
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the; the
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a; /
What _______honest boy! And he is ______ best student of all.
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a; a
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an; the
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a; the
D
the; the
We are planning______ one-day trip to Century Park during the winter holiday ______ trip must be full of fun, I think.
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a, The
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an, The
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the, A
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the, The
GuanTianlang is _____________ 14-year-old boy, but he is famous all over the world.
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a
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an
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the
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__________ valuable advice it is. It will be of __________ great value to me.
#32595
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What a; the
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What ; /
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How ; the
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How ; /