下列化合物作为酰化剂,反应活性最强的是:
A: [img=167x51]1802d0fb62e6653.png[/img]
B: [img=199x56]1802d0fb6fa5021.png[/img]
C: [img=189x55]1802d0fb7a44b39.png[/img]
D: [img=231x47]1802d0fb8807320.png[/img]
A: [img=167x51]1802d0fb62e6653.png[/img]
B: [img=199x56]1802d0fb6fa5021.png[/img]
C: [img=189x55]1802d0fb7a44b39.png[/img]
D: [img=231x47]1802d0fb8807320.png[/img]
举一反三
- 下列化合物作为酰化剂,反应活性最强的是: A: [img=167x51]1802eb2ec771375.png[/img] B: [img=199x56]1802eb2ed512f76.png[/img] C: [img=189x55]1802eb2edffa455.png[/img] D: [img=231x47]1802eb2eed2f89a.png[/img]
- 下列化合物作为酰化剂,反应活性最强的是: A: [img=167x51]1803924c0b311dc.png[/img] B: [img=199x56]1803924c181db60.png[/img] C: [img=189x55]1803924c23e2926.png[/img] D: [img=231x47]1803924c315cfab.png[/img]
- 图中的力F对O点的矩为多少?[img=744x149]18036e09021933f.png[/img][img=685x233]18036e090d730fc.png[/img][img=735x315]18036e0919b7d9d.png[/img] A: 0,Fl, Fb B: Fl, Fb,0 C: Fb,Fl,0 D: Fl,Fb,0
- 图中的力F对O点的矩为多少?[img=744x149]18036264958edca.png[/img][img=685x233]18036264a0a5ed0.png[/img][img=735x315]18036264ac698ce.png[/img] A: 0,Fl, Fb B: Fl, Fb,0 C: Fb,Fl,0 D: Fl,Fb,0
- 图中的力F对O点的矩为多少?[img=744x149]1802f3fa5d08ce2.png[/img][img=685x233]1802f3fa67fe3e8.png[/img][img=735x315]1802f3fa7529558.png[/img] A: 0,Fl, Fb B: Fl, Fb,0 C: Fb,Fl,0 D: Fl,Fb,0