rock hound 2015 science olympiad (es) and 2017 (ms) + more soon 單詞卡 學習 測試 配對 marble 點擊卡片即可翻轉👆 hardness: 3-4 luster: dull to pearly to subvitreous streak: white cleavage: perfect density: 2.6-2.8 formula: caco3 uses: sculpture, construction, can be many colors coarse...
Congratulations to Matthew Siracusa and William Rule who placed first in the Robot Arm competition of the Science Olympiad SE PA Regional Tournament last Wednesday! They used our custom laser cutting service to cut the base and structural components of the robot arm out of black ABS. We wrote ...
根据第一段On July 14,2017,Maryam Mirzakhani,Stanford professor of mathematics and the first female winner of the Fields Medal in Mathematics,died at the age of 40.(2017年7月14日,斯坦福大学数学教授、首位菲尔兹数学奖女性得主玛丽亚姆•米尔扎哈尼(Maryam Mirzakhani)去世,享年40岁。)...