Decibel
发表于 2025-3-30 08:20:31
http://reply.papertrans.cn/24/2317/231632/231632_51.png
floaters
发表于 2025-3-30 13:03:33
Cobalt, a widely distributed but relatively uncommon element in the earth’s crust. It occurs biologically in vitamin B., which contains Co. bonded octahedrally to five nitrogen atoms (four from pyrroline rings and one from a benzimidazole ring) and the carbon atom of a CN. group. The industrial extraction
Grating
发表于 2025-3-30 17:08:26
Nickel,e earth’s crust, there are relatively few known deposits of nickel ores that are capable of being worked economically. One such deposit is that of pentlandite (Ni, Fe). S. at Sudbury, Ontario. The metal is extracted either electrolytically or by the Mond carbonyl process (section 10.2.2).
消息灵通
发表于 2025-3-30 21:30:27
http://reply.papertrans.cn/24/2317/231632/231632_54.png
并入
发表于 2025-3-31 03:42:45
http://reply.papertrans.cn/24/2317/231632/231632_55.png
烦扰
发表于 2025-3-31 08:06:50
http://reply.papertrans.cn/24/2317/231632/231632_56.png
agitate
发表于 2025-3-31 09:25:59
http://reply.papertrans.cn/24/2317/231632/231632_57.png
FEAS
发表于 2025-3-31 17:12:26
http://reply.papertrans.cn/24/2317/231632/231632_58.png
persistence
发表于 2025-3-31 21:08:23
http://reply.papertrans.cn/24/2317/231632/231632_59.png
背叛者
发表于 2025-3-31 22:19:20
http://reply.papertrans.cn/24/2317/231632/231632_60.png