1 . It is indeed an honour for ________ and Chinese medicine to be spread around the world. （根据句意填空）
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2 . Then Shenzhou 6 and 7 completed ________ and the first Chinese spacewalk, followed by the vehicle Jade Rabbit being sent to the moon to study its surface. (根据句意填空)
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3 . Finding and keeping the right balance between progress and the protection of cultural sites __________________ . (根据句意完成句子)
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