A.30 B.45 C.15 D.25 E.60
A.100 B.200 C.150 D.50 E.250
A.注入藥物未充分研磨 B.選用導(dǎo)管的管徑過(guò)細(xì) C.營(yíng)養(yǎng)液稠厚 D.不定時(shí)沖洗 E.持續(xù)長(zhǎng)時(shí)間喂養(yǎng)