题目内容

I still remember the street was full of people enjoying themselves during the festival.

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She was able to treat and rescue the sick as well as save those who suffered from sea disasters.

在原理图设计图样上放置的元器件是（）

A. 原理图符号
B. 文字符号
C. 元器件封装符号
D. 任意符号

进行元器件封装设计，必须启动（）编辑器

A. PCB
B. Schematic
C. PCB Library
D. Schematic Library

位移法求解超静定结构，默认转角φ顺时针为正，线位移△则以整个杆件顺时针方向转动为正。

A. 对
B. 错