【单选题】等温地吹出一个直径0.05m的肥皂泡, 则肥皂泡内外的压强差为( ) (肥皂泡的表面张力系数为0.025N/m )
【简答题】请选出正确的选项。 1.It was _____ opportunity to miss. A. too good an B. a too good C. too a good D. too good 2. I don ’ t like it at all. It can ’ t be _____. A. better B. worse C. best D. worst 3. There was ...
【单选题】He said, “ Don ’ t do that again. ” He ____ me ______ that again.
B.
said to me; don ’ t do
【单选题】等温地吹出一个直径 的肥皂泡,则肥皂泡内外的压强差为( )(肥皂泡的表面张力系数为 )
【单选题】已知某肥皂水的表面张力为 0.025 N/m,则由该肥皂水形成的直径为 1 cm 的肥皂泡的内外压力差为
【单选题】一肥皂泡的站半径为R,表面张力为r,则肥皂泡的内外压力差为
【单选题】一肥皂泡的半径为R,表面张力为γ,则肥皂泡的内外压力差为ΔP为( )。
【简答题】肥皂泡的半径为 r ,表面张力为 s ,则肥皂泡内外压力差 D p = _________ 。
【简答题】5 Fill in the blanks with suitable prepositions or adverbs. 1. I like this market most, because all the fruits and vegetables, shaded by umbrellas, are laid ________ so nicely. 2. He said, politely an...