A:cameu
B:camealong
C:cameback
D:cameabout
6C(s)+5H2(g)+3N2(g)+9O2(g)═2C3H5(ONO2)3(l)△H1
2H2(g)+O2(g)═2H2O(g)△H2
C(s)+O2(g)═CO2(g)△H3
则反应4C3H5(ONO2)3(l)═12CO2(g)+10H2O(g)+O2(g)+6N2(g)的△H为( )
A:Wow! What a great model plane! Is it yours,Jack?
B:Yes,it's mine.
A:____
B:For two days.
B:At Green Store。
B:It's six dollars.
B:I've given it to Peter.
B:Because he likes it a lot.
A.How much is it?
B.Why did you give it to Peter?
C.How long have you had it?
D.Where did you buy it?
E.Why are you selling it?
F.Where's your old model plane?
G.Can I have a look at your old model plane?
1902年,荣宗敬、荣德生兄弟二人与他人合股创办无锡保兴面粉厂,后不断发展壮大,荣氏兄弟也被称为“面粉大王”。保兴面粉厂创办的历史背景不包括( )