if the air in a tank is removed with each stroke of a vacuum

if the air in a tank is removed with each stroke of a vacuum 一道有关工作效率的数学问题,好困惑,Tap A can fill a water tank in 25 minutes,and Tap B can fill the same tank in 20 minutes.(a)If the volume of the tank is 5000cm^3,find the rate of flow of water(in cm^3/min)for(i)Tap A,and(ii)Tap B,(b A tank of 0.1-m3 volume contains air at 25oC and 101.33 kPa.The tank is connected to a compressed- A helmet is a large hard hat that protects the head and is conneted to the air tank翻译 do you need everyone______(carry)the air tank for you? If there in( )pollution,the air in oIf there in( )pollution,the air in our city will be ( )dirtier. If the () of carbon dioxide in the atmosphere is increased as a result of air pollution.ArateBproportionCextentDamount Laid in the air(A)是什么意思 if i ____ a bird,I will fly in the air.A.am B is C.was D.were When n liters of fuel was added to a tank that was already full,the tank was filled to of its capacity.In terms of n,what is the capacity of the tank,in liters? if more people in American could use a bus or train ,then the air would be cleaner 的意思 It is not good to put onlt a little water in the fish tank It is not good to put onlt a little water in the fish tank Air tank can p___many hours of air in the open air stick in the air in the air是什么意思 in the air on the air