第一章和第二章讨论答疑区

第三题和第四题

第三题和第四题

by 3210010089 黄奕霖 -
Number of replies: 1

第三题能解释一下吗,还有第四题的正确答案是分母没有乘1000吗

In reply to 3210010089 黄奕霖

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