水对人类生活、生产有着重要意义。 ① 图一是某自来水厂的净水过程示意图，其中活

My mother is a village woman, that is already in her fifties. She has a little education, but she knows knowledge is of greatly importance to young people. She often asks me how I get along for my studies and encourages me study hard. My mother do everything she can for me so that I can spend more time on my studies. Once she was badly ill and had stayed in bed for several day. When I got home, I found the light was still on and my mother was sitting in bed, made new clothes for me! I was so deeply moving that tears came to my eyes. Such is my mother, a kind but hard-working woman.

根据下面语境，为空格处选择合适的词语，将其序号填写在横线上。

        2010年上海世博会是一次人类文明成果（1）   盛会。它（2）   了人类在城市建设上的卓越智慧，使不同民族、不同文化背景的人们（3）   在一起，沟通心灵，共谋发展。

        A．汇聚        B．荟萃        C．凝聚

外径千分尺用以测量零件的（）、宽度和厚度等。

工程项目过程控制中，典型的项目管理过程是( )。

A．检查—计划—启动—实施—处理
B．计划—启动—实施—检查—处理
C．启动—计划—实施—检查—处理
D．启动—计划—检查—实施—处理

最小离地间隙是叉车在满载低速行驶时通过性的主要参数。