2人脑不仅反映当前所看到、听到的事物,还能反映过去经历过的事物和想象出来从未见到过的事物,这说明人脑对现实的反映具有什么特点
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