Halloween is on the last day of October, it is very popular in the western country. On that day, people will dress in the horrible style, especially f...

nbsp;nbsp;nbsp;nbsp;nbsp;nbsp; nbsp;nbsp;nbsp;nbsp;nbsp;nbsp;nbsp; 最近我们组在探讨生物医学光谱成像中谱空间最小支撑集的问题，涉 ... ,科学网...

Last week our teacher told us that there would be a maths exam the next week. I was frightened at the thought of the coming exam because I was not goo...