阿基米德多面体(Archimedean polyhedra)是由两种或三种正多边形面组成的半正多面体.它共有13种,其特点是棱长相等.如图1,顺次连接棱长为2的

阿基米德多面体(Archimedean polyhedra)是由两种或三种正多边形面组成的半正多面体.它共有13种,其特点是棱长相等.如图1,顺次连接棱长为2的正方体各棱的中点,得到一个阿基米德多面体

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—________ I have two tickets for the Chinese Farmers’ Painting Exhibition? —Sorr

—________ I have two tickets for the Chinese Farmers’ Painting Exhibition? —Sorry. The tickets are s

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— Is that man your friend Tom? —That man ________ be him,because he has gone to

— Is that man your friend Tom? —That man ________ be him,because he has gone to Canada.

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—Our Party’s 100th birthday is coming. —Oh, great! We will have many activities

—Our Party’s 100th birthday is coming. —Oh, great! We will have many activities to ________ celebrat

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Our teacher often warnsus it’s ______ to leave much personal information on the

Our teacher often warnsus it’s ______ to leave much personal information on the Internet.

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