A:淞沪会战
B:太原会战
C:徐州会战
D:枣宜会战
Our school library has floors, and the reading room is on the floor.
一矿石样品的质量为58g,将其放入盛有50mL酒精的量筒中,样品完全浸入酒精后酒精的液面上升至70mL处.已知空量筒质量为60g,量筒底面与水平桌面的接触面积为2cm2.(g取10N/kg,酒精密度为0.8×103kg/m3,1mL=1cm3)求:
_____ your article carefully, some mistakes can be avoided.