大禹治水用的方法是“（）”，即利用水自高向低流的自然趋势，顺地形把壅塞的川流疏通。

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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有HTML语句“新浪网页”，它的作用是（）。

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“大禹治水”治理的是哪个流域的洪水？

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逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

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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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“大禹治水”的故事家喻户晓，大禹治理的是哪个流域的洪水（）

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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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