英文数学符号的读法
摘要：
+ plus 加号；正号- minus 减号；负号± plus or minus 正负号× is multiplied by 乘号÷ is divided by 除号＝ is equal to 等于号≠ is not equal to 不等于号≡ is equivalent to 全等于号≌ is equal to or approximately equal to 等于或约等于号≈ is a... 阅读全文
posted @ 2009-12-26 22:52 中道学友 阅读(708) 评论(0) 推荐(0) 编辑
