【简答题】.建筑施工总平面图在绘制时常用的比例为( )。
【单选题】Circle the one word in each of the following groups that is the antonym of the other three.
【判断题】正弦波的电压峰峰值等于波形在屏上所占的垂直格数乘以示波器的主扫描时间系数。
【单选题】Circle the one word in each of the following groups that is the antonym of the other three.