Contact us
Choose a category below so we can get back to you as quickly as possible.
11/18x3/14x21/55 =(11/18x21/55)x3/14 =7/30x3/14 =1/20 如果本題有什麼不明白可以追問,如果滿意請點擊“好評”
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.