单选题:David talked with a friend of ________on the internet for a 题目分类:英语 题目类型:单选题 查看权限:VIP 题目内容: David talked with a friend of ________on the internet for a long time yesterday. A.he B.his C.him D.himself 参考答案: 答案解析:
Shelly had prepared carefully for her English examination s Shelly had prepared carefully for her English examination so that she could be 分类:英语 题型:单选题 查看答案
公共物品一旦被提供,增加一个人的消费并不增加任何额外成本,这体现了公共物品的( )特征。 公共物品一旦被提供,增加一个人的消费并不增加任何额外成本,这体现了公共物品的( )特征。 A.排他性 B.非排他性 C.竞争性 D.非竞争性 分类:英语 题型:单选题 查看答案