共价键键长共价键键长共价键键长共价键键长H-H74H-F92H-Cl127H-Br141H-I161C-H109C-C154C-Si186C-N147C-O143C-P187C-S181C-F133C-Cl177C-Br194C-I213N-H101N-N146N-P177N-O144N-F139N-Cl191N-Br214N-I222O-H101O-P160O-S151O-F142O-Cl164O-Br172O-I194Si-H148Si-Si234Si-O161SI-S210Si-F156Si-Cl204Si-Br216Si-I240P-H142P-Si227P-P221P-F156P-Br222P-I243S-H134S-F158S-Cl201S-Br225S-I234F-F143Cl-Cl199Br-Br228I-I266CC134CN127CO123NN122NO120OO121C≡C121C≡N115N≡N110键能（bondenergy）通常指在标准状态下气态分子拆开成气态原子时，每种键所需能量的平均值。
答：-------NH3 -------| --Cl___Pt____Cl -------| -------NH3 -------NH3 -------| --Cl...详情>>
答：这是很正常的开机上电自检！没必要紧张！详情>>
问：我的惠普打印机安装WINDOWS打印机软件时搜索了HP Deskjet D240...
答：HP官方驱动下载，只要填上你打印机的型号就能找到合适的驱动。详情>>
