题目内容

____是指在室外给水管网压力不足，给水系统中用于升压、稳压、贮水和调节的设备。

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选择给水方式，可按建筑物的层数估算所需最小服务压力值，从地面算起，一般建筑物一层需要kPa，二层为kPa，三层及三层以上的建筑物、每增加一层增加kPa。

【单选题】What is considered important in personal advancement in America?

A. Mobility.
B. Character.
C. Personal influence.
D. Family background.

【多选题】What are the traits leading to success in the United States?

A. the willingness to work hard
B. scholarship or skill
C. initiative,
D. an agreeable and outgoing personality.

【填空题】Friends eyed each other all the time, not exactly with envy, but with care to see who____(get ahead)