Contact us
Choose a category below so we can get back to you as quickly as possible.
總份數:2+3+5=10(份),水泥的噸數:20×210=4(噸),沙子的噸數:20×310=6(噸),石子的噸數:20×510=10(噸);答:需要水泥4噸,沙子6噸,石子10噸.
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.