题干

如图(a)所示是一款缩放式晾衣架,展开时用于晾晒衣服,不用时可收缩节省空间。现有如图(b)所示的支撑杆与斜拉杆,支撑杆是外径为30mm的铝合金圆管,斜拉杆是宽度为25mm、厚度为5mm的铝合金材料。请你设计支撑杆与斜拉杆之间的连接件(见图b中圆圈部分)。设计要求如下:

A.连接件能可靠地连接支撑杆与斜拉杆,并能实现晾衣架的缩放功能;

B.连接件与支撑件能可靠固定,并作为晾衣架的支撑脚;

C.连接件结构简单、安装方便。

请根据上述设计要求,完成以下任务:

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同类题3

阅读下列短文,从每题所给的四个选项中(A, B, C, D), 选出最佳选项。

    My parents moved from Mexico to South Texas in the early 90s with the hope for a brighter future for their family of nine---my parents, four boys and three girls. My parents have always wanted the best for us and they have done everything possible to encourage us to get a university degree. Never did they think that by pushing us that direction, it also meant encouraging us to move away and be distant from each other.

Initially(起初), getting accustomed to the American culture and lifestyle was very difficult for my parents. They come from a culture where kids grow up together, go to school together and most of the time live in the same neighborhood. From our point, American family values were a bit different. Typically in the US, when you turn 18, you are expected to graduate from high school, move out, find a university, possibly find a partner, get married and start a life together. Most of these decisions take you away from home; usually you have to follow opportunity and wherever that will take you.

This is my family's current situation. I graduated from Bethel College in Indiana in 2010, and in order to fulfill my financial responsibilities of paying off student loans, I moved to Washington State for my job with Experience Mission. Ideally my parents wanted me to come home to South Texas, but that wasn't where my opportunity took me.

Currently, my sister Jennifer lives in Waco, Texas, about eight hours from my parents. My two younger brothers also decided to go to college at Bethel and are away from my parents. More than likely, when they graduate, they will probably not move back home to South Texas.

My parent never imagined that their dream for a better future would separate our family this way.Facebook has played a crucial(决定性的) role in the way we communicate while living in different places. Since we all use Facebook, we have found a place to connect and feel as if we were there together with each other.