奇蹄目主要以第四指(趾)负重，其余各趾退化或消失。（）

奇蹄目主要以第三指（趾）负重，其余各趾退化或消失。

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偶蹄目发达的是第三、四指（趾）负重，其余各趾退化或消失。

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拇指（趾）可以与其四指（趾）相对而握的动物是（）.

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奇蹄目的最主要的特征是（），（）。代表动物（）。

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The full title of the U.K. is the United Kingdom of （）and （）

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public and private colleges and universities and community colleges offer（）.

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（）is used for calling and replying,and for transmitting acknowleding and relaying distress alerts.

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The way in which people address each other depends on their age, sex, social group and personal relationship. The English system of address forms frequently used includes first name, last name, title+last name, （）, and kin term.

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Solid waste generation，and electricity and water consumption are costly and have their own set of environmental（）.

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