Only by increasing the number of doctors by 50 percent ________ properly in this hospital.

A．can be the patients treated

B．can the patients be treated

C．the patients can be treated

D．treated can be the patients

位于海面下200m的“南海Ⅰ号”沉船的价值可与秦兵马俑相提并论，打捞人员正在采取先将一个大铁箱（沉箱）沉入海底把沉船整体装进去，然后借助若干个充气后体积为10m3的气囊的浮力，用大型起吊船吊出海面的方法进行打捞。海水对海底沉船的压强是_____________Pa，每个气囊充气后在海水中受到的浮力大小为_____________N。（ρ_海水＝1.03×10³kg/m³，g取10N/kg）