在美国高中,考试成绩是按A,B,C,D来分的,分数各是多少答:按百分比计算(美国/欧洲评分系统):A - 90–100% (A- = 90–92%, A = 93–96%, A+ = 97–100%)B - 80–89% (B- = 80–82%, B = 83–86%, B+ = 87–89%)C - 70–79% (C- = 70–72%, C = 73–76%, C+ = 77–79%)D - 60–70% (D- = 60–62%, D...
给二十道六年级奥数题(不要太难)答:13. 右图是三个半圆构成的图形,其中小圆直径为 8,中圆直径为 12, 14.幼儿园的老师把一些画片分给 A, B, C三个班,每人都能分到 6张 .如果只分给 B班,每人能得 15张,如果只分给 C班,每人能得 14张,问只分给 A班,每人能得几张? 15. 两人做一种游戏:轮流报数,报出的数只能是 1, 2, 3, 4...