A.Because they are made from beef. B.Because they are cheaper than any other kind of food. C.Because they are served quickly and at a low price. D.Because hamburger is the only fast food in America.
【简答题】某不饱和烃 A (C 9 H 16 ) ,催化加氢得到 B (C 9 H 18 ) 。 A 先臭氧化再还原水解得到 C (C 9 H 16 O 2 ) , C 被 Ag 2 O 氧化得到羰基酸 D (C 9 H 16 O 3 ) , D 被 Br 2 /NaOH 氧化得到二羧酸 E (C 8 H 14 O 4 ) , E 受热得到 4- 甲基环己酮,请推测 A , B , C , D , E 的结...