选择对话的正确内容：－Lucy,thisisMrSmith,myuncle.－Howdoyoudo,Lucy?－[]A．Howdoyoudo,MrSmith?Goodmorning.B．Howareyou,MrSmith?Nicetoseeyou.C．Howdoyoudo,Mr
| 选择对话的正确内容： －Lucy, this is Mr Smith, my uncle. －How do you do, Lucy? －________ [ ] A．How do you do, Mr Smith? Good morning. B．How are you, Mr Smith? Nice to see you. C．How do you do, Mr Smith? Nice to see you. D．How are you, Mr Smith? Good morning. |
| “How do you do？”的应答为“How do you do?”. |
半径为R，均匀带正电荷的球体在空间产生球对称的电场；场强大小沿半径分布如图所示，图中E0已知，E- 2020-05-13 …
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