题目

She doesn’t know anyone here.She has got_________to talk to. A.anyone               B.someone             C.everyone            D.no one 答案：D 解析: “她在这儿一个人也不认识，她无人可以交谈”。动词不定式to talk to作one的后置定语。下列物理量中，属于矢量的是 （ ）A.电势B.电压C.电势能D.电场强度