题目

“I see you've got a bit of water on your coat,” said the man at the petrol station. “Is it raining out there?”“No, it's pretty nice,” I replied, checking my sleeve. “Oh, right. A pony(马驹) bit me earlier.” As it happened, the bite was virtually painless: more the kind of small bite you might get from a naughty child. The pony responsible was queuing up for some ice cream in the car park near Haytor, and perhaps thought I'd jumped in ahead of him. The reason why the ponies here are naughty is that Haytor is a tourist-heavy area and tourists are constantly feeding the ponies萘环上的碳原子的编号如（I）式，根据系统命名法，（II）式可称为2一硝基萘，则化合物 （III）的名称应是（ ）A．2，6一二甲基萘 B．2，5一二甲基萘C．4，7一二甲基萘 D．1，6一二甲基萘