【单选题】According to the passage, in which year the Montreal Games was held?
【单选题】In which year did The World of English begin to appear?
【判断题】图形对任意相互垂直的轴的惯性矩之和,等于它对该两轴焦点的极惯性矩
【简答题】额定电压U1N/U2N=3300/220V的单相变压器,其变比为____。(保留一位小数)
【单选题】针织面料裁剪前需要进行( )来保证裁片尺寸稳定