题目

已知平行四边形ABCD(AB>BC)，分别以点A、B、C、D为起点或终点的向量中，与向量的模相等的向量是▼. 答案：解析:略 The more he read, the more questions he thought ________. [　　] A．to ask B. of to ask C．of to be asked D．of asking