- 搜標(biāo)題
- 搜題干
- 搜選項(xiàng)
單項(xiàng)選擇題
兩種流體的對(duì)流傳熱膜系數(shù)分別為a1和a2，當(dāng)a1<
兩種流體的對(duì)流傳熱膜系數(shù)分別為a1和a2，當(dāng)a1<
A．a(chǎn)1
B．a(chǎn)2
C．a(chǎn)l和a2
D．與兩者無(wú)關(guān)
