A~G是几种烃的分子球棍模型(如图),据此回答下列问题:(1)常温下含碳量最高的气态烃是________________________________________(填字母); (2)能够发生加成反应的烃有________种: (3)一卤代物种类最多的是________(填写字母); (4)写出实验室制取D的化学方程式__________________________________; (5)写出F发生硝化反应的化学方程式_____________________________________。— John this week? —No. He’s on holiday. A.Does, work B.Did work C.Has, worked D.Is, working