推 alonefish:謝謝你~>.<~ 218.162.81.34 05/10 17:18
→ alonefish:可是有點不懂= =為什麼要*五百萬@@ 218.162.81.34 05/10 17:35
→ alonefish:阿 懂了= =哈哈哈~謝謝你>///< 218.162.81.34 05/10 17:36
※ 引述《alonefish (小花仔~)》之銘言：
: A red blood cell has a 120-day life span.if an average adult has 5 L(5000cm3)
: of blood and each cubic millimeter contains 5 million RBCs,how many new cells
: must be produced each second to replace the entire RBC population?
: 答案是 2400000 可是不知道怎麼算 >0< 請大大幫忙
5000L X1000(cm3換算成mm3) X5000000 /120 /24(一天24小時) /3600(一小
時3600秒) = 2411265
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 218.34.27.41
※ 編輯: hizone 來自: 218.34.27.41 (05/10 16:36)