A:80mL
B:40mL
C:30mL
D:15mL
一平底玻璃杯放在水平桌面上,内装150g的水,杯子与桌面的接触面积是10cm2,如图所示。求:(g取10N/kg)
— What did he _______ just now?— Sorry, I didn't catch his words. I_______ about something else.
上学路上,你可以跟老师和同学说: