(单选题)一台降压变压器,如果一次绕组和二次绕组同用一样材料和同样截面积的导线绕制,在加压使用时,将出现(本题2.0分)
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
免费的网站请分享给朋友吧